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1.07ct Fancy Light Yellow Green GIA certified Loose Diamond
Located in London, GB
Loose GIA diamond 1.07ct natural fancy light yellow green colour. Total Diamond Weight: 1.07ct
Category

2010s British Loose Gemstones

Materials

Diamond

GIA Certified 1.08 Carat Emerald Cut Vivid Yellow Zimmi Loose Diamond
By Hasbani Diamonds
Located in London, GB
presented either as a loose Diamond or transformed into a personalized piece such as a pendant, ring, or
Category

2010s Sierra Leonean Modern Loose Gemstones

Materials

Diamond

GIA Certified 1.01 Carat Pear Shape Vivid Yellow Zimmi Loose Diamond
By Hasbani Diamonds
Located in London, GB
jewelry, offers this stunning pear shape vivid yellow diamond that can be presented either as a loose
Category

2010s Sierra Leonean Modern Loose Gemstones

Materials

Diamond

GIA Certified 1.26 Carat Oval Brilliant Vivid Yellow Zimmi Loose Diamond
By Hasbani Diamonds
Located in London, GB
that can be presented either as a loose Diamond or transformed into a personalized piece such as a
Category

2010s Sierra Leonean Modern Loose Gemstones

Materials

Diamond

GIA Certified 0.68ct Round Brilliant Loose Diamond
Located in Laguna Beach, CA
Loose round brilliant diamond, .68 carats. GIA-graded H color, VS1 clarity, symmetry is good. The
Category

Late 20th Century Loose Gemstones

Materials

Diamond

1.41ct GIA certified fancy yellow diamond loose
Located in Boca Raton, FL
GIA certified diamond, beautiful fancy yellow, comes with box and papers! Natural Color Diamond
Category

21st Century and Contemporary Loose Gemstones

Materials

Yellow Diamond

GIA Certified Oval Brilliant Loose Diamond 1.48ct
Located in Laguna Beach, CA
1.48-carat oval brilliant cut diamond. GIA graded H color, Vs1 clarity. Measures 7.89 x 6.31 x
Category

Mid-20th Century Loose Gemstones

Materials

Diamond

GIA Certified 1.01 Carat Brilliant Cut Loose Diamond
Located in New York, NY
1.01 Round Brilliant Cut Loose Diamond GIA certified D/ SI2 Grade Cut : Good Polish: Very Good
Category

2010s American Loose Gemstones

Materials

Diamond

GIA Certified 1.01 Carat Brilliant Cut Loose Diamond
GIA Certified 1.01 Carat Brilliant Cut Loose Diamond
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W 0.25 in D 0.17 in L 0.25 in
GIA Certified 1.50 Carat Marquise Diamond Loose Stone
By Roman Malakov
Located in New York, NY
A marquise cut loose diamond certified by GIA as G color, VS2 clarity, with good polish and
Category

21st Century and Contemporary American Loose Gemstones

Materials

Diamond

GIA Certified 1.50 Carat Marquise Diamond Loose Stone
GIA Certified 1.50 Carat Marquise Diamond Loose Stone
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W 0.24 in D 0.14 in L 0.5 in
Huge Loose GIA certified heart brilliant diamond 4.57ct
Located in Boca Raton, FL
GIA certified diamond, stunning heart brilliant 4.57 carats! Natural Diamond: Color: Fancy Yellow
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

IGI Certified 0.92 Carat Round Brilliant Cut Loose Diamond
Located in New York, NY
0.92 Round Brilliant Cut Natural Loose Diamond IGI certified J / SI2 Polish: Very Good
Category

2010s American Loose Gemstones

Materials

Diamond

IGI Certified 0.92 Carat Round Brilliant Cut Loose Diamond
IGI Certified 0.92 Carat Round Brilliant Cut Loose Diamond
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W 0.24 in D 0.16 in L 0.24 in
GIA certified diamond 1.01ct Fancy PInk diamond loose NATURAL COLOR
Located in Boca Raton, FL
Loose GIA diamond fancy pink, will comes with all certififcates. Natural Diamond(s): Color: Fancy
Category

21st Century and Contemporary Loose Gemstones

Materials

Pink Diamond

GIA Certified Round Brilliant Cut Loose Diamond 1.01 ct
Located in Laguna Beach, CA
Loose 1.01 carat round brilliant cut diamond. GIA graded G color, Si2 clarity, Very Good cut grade
Category

Mid-20th Century Loose Gemstones

Materials

Diamond

GIA certified fancy light pink heart diamond loose 1.03ct
Located in Boca Raton, FL
Natural Color Diamond: Color: Fancy Light Pink Cut: Heart Brilliant Carat: 1.03ct Clarity: I1
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, Pink Diamond

GIA Certified 0.93 Carat Round Brilliant Cut Loose Diamond
Located in Laguna Beach, CA
0.93ct RBC GIA i color/VVS1 Clarity, VG cut Diamond 0.93 carat round brilliant cut diamond. GIA
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

GIA Certified Loose Round Brilliant Cut Diamond 2.41 ct
Located in Laguna Beach, CA
2.41 carat round brilliant cut diamond graded by GIA. The color grade is I, clarity is Si2. The cut
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

GIA Certified 1.72 Carat Cushion Cut Diamond Loose Stone
By Roman Malakov
Located in New York, NY
A beautiful cushion cut diamond certified by GIA as G color, SI1 clarity with excellent polish and
Category

21st Century and Contemporary American Loose Gemstones

Materials

Diamond

GIA Certified 1.72 Carat Cushion Cut Diamond Loose Stone
GIA Certified 1.72 Carat Cushion Cut Diamond Loose Stone
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W 0.26 in D 0.19 in L 0.28 in
GIA Certified 1.01 Carat Brilliant Cut Loose Diamond D / VS1
Located in New York, NY
1.01 Round Brilliant Cut Loose Diamond GIA certified D/ VS1 Grade Cut : Very Good Polish: EX
Category

2010s American Loose Gemstones

Materials

Diamond

GIA Certified 1.01 Carat Brilliant Cut Loose Diamond D / VS1
GIA Certified 1.01 Carat Brilliant Cut Loose Diamond D / VS1
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W 0.26 in D 0.16 in L 0.26 in
GIA Certified 1.50 Carat Brilliant Cut Loose Diamond G / IF
Located in New York, NY
1.50 Carat Round Brilliant Cut Loose Diamond GIA certified G / IF Grade Cut : Very Good Polish
Category

2010s American Loose Gemstones

Materials

Diamond

GIA Certified 1.50 Carat Brilliant Cut Loose Diamond G / IF
GIA Certified 1.50 Carat Brilliant Cut Loose Diamond G / IF
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W 0.3 in D 0.18 in L 0.3 in
GIA Certified 4.04 Carat Cushion Cut Loose Diamond H / VS1
Located in New York, NY
Our Gorgeous 4.04 Carat Cushion Cut Natural Loose Diamond will be the star of any unique engagement
Category

2010s American Loose Gemstones

Materials

Diamond

GIA Certified 2.02 Carat Oval Cut Loose Diamond E / VVS1
Located in New York, NY
Our Gorgeous 2.02 Carat Pear Shape Cut Natural Loose Diamond will be the star of any unique
Category

2010s American Loose Gemstones

Materials

Diamond

GIA Certified 2.02 Carat Oval Cut Loose Diamond E / VVS1
GIA Certified 2.02 Carat Oval Cut Loose Diamond E / VVS1
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W 0.4 in D 0.17 in L 0.28 in
GIA Certified 0.91CT D SI1 Round Brilliant Loose Natural Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: 56575 Stone Shape: Round Brilliant Diamond Weight: 0.91CT Clarity: SI1
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, White Diamond, Blue Diamond

0.87 Carat Loose D / VS1 Emerald Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.87 Carat Loose D / VS1 Emerald Cut Diamond GIA Certified Diamond General Info Diamond Cut
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.87 Carat Loose D / VS1 Emerald Cut Diamond GIA Certified
0.87 Carat Loose D / VS1 Emerald Cut Diamond GIA Certified
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W 0.3 in D 0.12 in L 0.19 in
2.07 Carat Loose H /SI1 Radiant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
2.07 Carat Loose H /SI1 Radiant Cut Diamond GIA Certified Diamond General Info Diamond Cut
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

2.07 Carat Loose H /SI1 Radiant Cut Diamond GIA Certified
2.07 Carat Loose H /SI1 Radiant Cut Diamond GIA Certified
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W 0.33 in D 0.2 in L 0.25 in
1.09 Carat Loose F/ VS2 Princess Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.09 Carat Loose F/ VS2 Princess Cut Diamond GIA Certified Diamond General Info Diamond Cut
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.09 Carat Loose F/ VS2 Princess Cut Diamond GIA Certified
1.09 Carat Loose F/ VS2 Princess Cut Diamond GIA Certified
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W 0.24 in D 0.16 in L 0.22 in
0.54 Carat Loose J/ VS2 Princess Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.54 Carat Loose J/ VS2 Princess Cut Diamond GIA Certified Diamond General Info GIA Report Number
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.54 Carat Loose J/ VS2 Princess Cut Diamond GIA Certified
0.54 Carat Loose J/ VS2 Princess Cut Diamond GIA Certified
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W 0.18 in D 0.13 in L 0.18 in
1.13 Carat Loose I / VS2 Princess Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.13 Carat Loose I / VS2 Princess Cut Diamond GIA Certified Diamond General Info GIA Report Number
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.13 Carat Loose I / VS2 Princess Cut Diamond GIA Certified
1.13 Carat Loose I / VS2 Princess Cut Diamond GIA Certified
Free Shipping
W 0.23 in D 0.17 in L 0.23 in
1.03 Carat Loose I / VS1 Princess Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.03 Carat Loose I / VS1 Princess Cut Diamond GIA Certified Diamond General Info Diamond Cut
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.03 Carat Loose I / VS1 Princess Cut Diamond GIA Certified
1.03 Carat Loose I / VS1 Princess Cut Diamond GIA Certified
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W 0.22 in D 0.17 in L 0.22 in
1.00 Carat Loose G / VS1 Asscher Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1 Carat Loose G / VS1 Asscher Cut Diamond GIA Certified Diamond General Info Diamond Cut: Asscher
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.00 Carat Loose G / VS1 Asscher Cut Diamond GIA Certified
1.00 Carat Loose G / VS1 Asscher Cut Diamond GIA Certified
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W 0.23 in D 0.16 in L 0.22 in
1.00 Carat Loose G / VS2 Heart Shaped Diamond GIA Certified
Located in Sherman Oaks, CA
1.00 Carat Loose G / VS2 Heart Shaped Diamond GIA Certified Diamond General Info GIA Report Number
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.00 Carat Loose G / VS2 Heart Shaped Diamond GIA Certified
1.00 Carat Loose G / VS2 Heart Shaped Diamond GIA Certified
Free Shipping
W 0.27 in D 0.12 in L 0.3 in
GIA Certified 2.01 Carat Loose Diamond G Color VVS2 Clarity
By Privosa Fine Jewelry
Located in Houston, TX
An incredible 2.01 ct Emerald Cut loose diamond. This diamond is gorgeous - white and bright! It is
Category

2010s Loose Gemstones

Materials

Diamond

GIA Certified 1.50 Carat Pear Cut Natural Diamond Loose Teardrop
By Antinori Fine Jewels
Located in Rome, IT
This sizeable 1.50 carat GIA certified pear cut diamond offers vibrant sparkle, a completely eye
Category

2010s Italian Modern Loose Gemstones

Materials

Diamond

GIA Certified 1.09 Carat Pear Shape Cut Loose Diamond E / IF
Located in New York, NY
Our Gorgeous 1.09 Carat Pear Shape Cut Natural Loose Diamond will be the star of any unique
Category

2010s American Loose Gemstones

Materials

Diamond

GIA Certified 1.09 Carat Pear Shape Cut Loose Diamond E / IF
GIA Certified 1.09 Carat Pear Shape Cut Loose Diamond E / IF
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W 0.35 in D 0.16 in L 0.22 in
1.00 Carat Loose F / VS2 Emerald Cut Diamond GIA Certified
Located in Sherman Oaks, CA
Diamond General Info Diamond Cut: Emerald Cut Measurements: 7.17 x 4.96 - 3.11 mm Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.00 Carat Loose F / VS2 Emerald Cut Diamond GIA Certified
1.00 Carat Loose F / VS2 Emerald Cut Diamond GIA Certified
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W 0.29 in D 0.13 in L 0.2 in
1.18 Carat Loose H / VS1 Princess Cut Diamond GIA Certified
Located in Sherman Oaks, CA
Diamond General Info Diamond Cut: Rectangular Modified Brilliant Measurements:6.11 x 5.68
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.18 Carat Loose H / VS1 Princess Cut Diamond GIA Certified
1.18 Carat Loose H / VS1 Princess Cut Diamond GIA Certified
Free Shipping
W 0.25 in D 0.17 in L 0.23 in
0.76 Carat Loose E / VS1 Princess Cut Diamond GIA Certified
Located in Sherman Oaks, CA
Diamond General Info Diamond Cut: Square Modified Brilliant Measurements: 6.67 x 6.63 - 4.17 mm
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.76 Carat Loose E / VS1 Princess Cut Diamond GIA Certified
0.76 Carat Loose E / VS1 Princess Cut Diamond GIA Certified
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W 0.27 in D 0.17 in L 0.27 in
GIA Certified 1.00 Carat G VS2 Loose Princess Cut Natural Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC57075 Stone Shape: SQUARE BRILLIANT Diamond Weight: 1.00ct Clarity: VS2
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, White Diamond, Yellow Diamond

1.53 Carat Loose F / VVS2 Marquise Cut Diamond GIA Certified
Located in Sherman Oaks, CA
Diamond General Info GIA Report Number: 5181350659 Diamond Cut: Marquise Measurements: 13.19 x
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.53 Carat Loose F / VVS2 Marquise Cut Diamond GIA Certified
1.53 Carat Loose F / VVS2 Marquise Cut Diamond GIA Certified
Free Shipping
W 0.23 in D 0.15 in L 0.52 in
1.94 Carat Loose E / VS1 Emerald Cut Diamond GIA Certified
Located in Sherman Oaks, CA
Diamond General Info GIA Report Number: 6187350670 Diamond Cut: Emerald Cut Measurements: 7.90 x
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.94 Carat Loose E / VS1 Emerald Cut Diamond GIA Certified
1.94 Carat Loose E / VS1 Emerald Cut Diamond GIA Certified
Free Shipping
W 0.26 in D 0.18 in L 0.32 in
1.22 Carat Loose H / I1 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.22 Carat Loose H / I1 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond Cut
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.26 Carat Loose H / VS2 Pear Shaped Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.26 Carat Loose H / VS2 Pear Shaped Cut Diamond GIA Certified Diamond General Info Diamond Cut
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.26 Carat Loose H / VS2 Pear Shaped Cut Diamond GIA Certified
1.26 Carat Loose H / VS2 Pear Shaped Cut Diamond GIA Certified
Free Shipping
W 0.37 in D 0.15 in L 0.25 in
0.72 Carat Loose J / VVS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.72 Carat Loose J / VVS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.71 Carat Loose K / VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.71 Carat Loose K / VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.86 Carat Loose D / VS1 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.86 Carat Loose D / VS1 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

3.05 Carat Cushion Cut Natural Loose Diamond F / SI1 GIA Certified
Located in New York, NY
Gorgeous GIA Certified 3.05 Carat Cushion Cut Natural Diamond. Color - F Clarity- SI 1 Symmetry
Category

2010s American Loose Gemstones

Materials

Diamond

1.10 Carat Loose D / I1 Marquise Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.10 Carat Loose D / I1 Marquise Brilliant Cut Diamond GIA Certified Diamond General Info GIA
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.37 Carat Loose K / VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.37 Carat Loose K / VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.53 Carat Loose M/VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.53 Carat Loose M/ VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond Cut
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.54 Carat Loose L/VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.54 Carat Loose L / VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.70 Carat Loose E / VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.70 Carat Loose E / VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.51 Carat Loose F/ VS1 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.51 Carat Loose F/ VS1 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.29 Carat Oval Cut Diamond Even Loose Pink Argyle Diamond GIA Certified FPP
Located in New York, NY
0.29 CARAT ROUND NATURAL FANCY PURPLISH PINK EVEN LOOSE PINK DIAMOND GIA CERTIFIED 0.29 CT FPP BY
Category

2010s American Loose Gemstones

Materials

Diamond

0.48 Carat Loose J/ VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.48 Carat Loose J/ VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.44 Carat Loose G/SI1 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.44 Carat Loose G/ SI1 Round Brilliant Cut Diamond GIA Certified Diamond General Info Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.00 Carat Loose J/ VS1 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
1.00 Carat Loose J/ VS1 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.71 Carat Loose F / VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.71 Carat Loose F / VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

1.14 Carat Loose H/ SI1 Round Brilliant Cut Diamond Gia Certified
Located in Sherman Oaks, CA
1.14 Carat Loose H/ SI1 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.61 Carat Loose H/ Si1 Round Brilliant Cut Diamond Gia Certified
Located in Sherman Oaks, CA
0.61 Carat Loose H/ SI1 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.94 Carat Loose I/ VS2 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.94 Carat Loose I/ VS2 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

0.59 Carat Loose F/ SI1 Round Brilliant Cut Diamond GIA Certified
Located in Sherman Oaks, CA
0.59 Carat Loose F/ SI1 Round Brilliant Cut Diamond GIA Certified Diamond General Info GIA Report
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

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Certified Loose Diamond For Sale on 1stDibs

On 1stDibs, you can find the most appropriate certified loose diamond for your needs in our varied inventory. Each design created in this style — which was crafted with great care and often made from Gold, Yellow Gold and 18k Gold — can elevate any look. In our selection of items, you can find a vintage example as well as a contemporary version. If you’re looking for a certified loose diamond from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 18th Century while another version may have been produced as recently as the 21st Century. There have been many well-made iterations of the classic certified loose diamond over the years, but those made by TJD, Harakh and Antinori Fine Jewels are often thought to be among the most beautiful. See these pages for a round cut iteration of this accessory, while there are also oval cut cut and emerald cut cut versions available here, too. There aren’t many items for men if you’re seeking a certified loose diamond, as most of the options available are for women and unisex.

How Much is a Certified Loose Diamond?

The price for a certified loose diamond starts at $241 and tops out at $1,800,000 with these more-jewelry-watches, on average, selling for $7,275.

Finding the Right loose-gemstones for You

Are you shopping for diamonds and other loose gemstones to create your own custom jewelry? 

Why might you purchase a diamond or gemstone “loose” — that is, on its own, not mounted in a piece of jewelry? Perhaps you’re a connoisseur looking to acquire a unique investment. The scarcity of high-quality colored diamonds, for instance, especially pink diamonds, means that their value increases over time; the same is true of rare Kashmir sapphires and Burmese rubies. Far rarer than diamonds, Paraiba tourmaline, discovered only in the 1980s, is treasured as much for its extraordinary color as its scarcity, both of which contribute to its high value.

A more common scenario would be that you’re hoping to create a very special piece of custom jewelry, such as an engagement ring or a milestone-birthday present, and want to personally select the most beautiful, unusual, or ultra-rare stone you can find and afford. Doing so adds to the romance and substance of the gift and can be a part of the story told as the jewel is passed from generation to generation.

If this sounds like you, read on for tips on becoming one of the world’s savviest gem hunters.

Educate yourself: When buying any piece of gem-set fine jewelry, you should familiarize yourself with the factors that determine a stone’s price. This will enable you to streamline your search for the perfect gem and have intelligent, productive conversations with sellers.

There is a wealth of information online, such as our diamond-buying guide and this overview of colored gemstones for engagement rings. The buying guides of the Gemological Institute of America (GIA), searchable by stone type, are also a widely trusted source for consumers venturing into the world of diamonds and gems for the first time.

Vet your vendor: If you peruse 1stDibs with any regularity, you know there is no shortage of vendors who deal in top-quality loose gemstones. (Read about our vetted sellers.) Finding a trustworthy, established dealer may be as easy as getting a recommendation from friends or family. And, although it may sound obvious, it pays to Google your candidates — and consult customer reviews — before making contact.

Harakh Mehta, designer and founder of the Mumbai, India–based fine-jewelry brand Harakh, has an innate understanding of proper client relations, especially when the customer is in unfamiliar territory. “Start chatting with the dealer, get to know them better," he says. "It’s very important to establish a comfort level. We never push a sale, as we want it to be a carefully considered purchase. So, if the client is not in a rush, we do it over a few virtual meetings or phone calls.”

Request documentation: The best dealers go to great lengths to furnish clients with documents verifying the quality rating, natural origin and provenance of a stone — showing, for example, that loose emerald hails from the famous Muzo mine in Colombia — and disclosing any treatments applied to enhance its appearance. (And who doesn't love emerald jewelry? The most valuable emeralds are the ones that have a deep bluish-green to true green color and no visible inclusions.)

If no grading report is available for a stone you are interested in, the dealer should be able to provide an authenticity document, such as an appraisal or info sheet, that has been signed by an in-house gemologist or professional appraiser. Google those names, too, for extra peace of mind.

Ask for videos and visuals: When transacting with a gem dealer online, you should always request real-time videos and photographs, since professional photos of a stone, usually on a white background, have likely been retouched for optimal presentation.

Read more about how to buy loose gemstones and find your dream gems today on 1stDibs.

Questions About Certified Loose Diamond
  • 1stDibs ExpertFebruary 22, 2021
    Whether or not you decide to buy certified diamonds is totally your choice, as certified diamonds aren't necessarily better than non-certified ones. However, people tend to gravitate towards certified diamonds because retailers prefer to sell them, which, in turn, promises a specific quality.
  • 1stDibs ExpertApril 5, 2022
    Yes, Cartier diamonds are indeed GIA certified. The Gemological Institute of America (GIA) works closely with Cartier and certifies everything from the cut and clarity to the color of the gem. Shop a collection of expertly vetted Cartier jewelry from some of the world’s top sellers on 1stDibs.
  • 1stDibs ExpertAugust 17, 2021
    In the United States, diamond rings are certified by an official gemological laboratory known as the Gemological Institute of America. A certified diamond ring means that the diamond has undergone a quality analysis by experts at an institution such as the GIA and these experts have issued a lab report that is indicative of the grading process.
  • 1stDibs ExpertFebruary 22, 2021
    When a diamond is GIA certified, it means that the stone has undergone the meticulous set of grading procedures that have been established by the Gemological Institute of America. The GIA is not a jeweler — it is an independent, nonprofit group that sets the standards for determining the quality of a diamond.
  • 1stDibs ExpertDecember 12, 2023
    Whether Cartier will set a loose diamond depends on the circumstances. If you purchased a piece of Cartier diamond jewelry and the stone has come loose, contact customer service for assistance with repairs. Cartier will usually not place a loose diamond that you purchased elsewhere in one of their settings. Find a wide range of Cartier diamond jewelry on 1stDibs.
  • 1stDibs ExpertFebruary 13, 2023
    While diamond studs don't need to be GIA-certified to be sold, experts typically recommend that you only purchase diamonds that carry certification from the Gemological Institute of America (GIA) or Authentic Gem Security Lab (AGSL). Certifications bring transparency to the buying process, allowing you to know the level of quality of a diamond before you purchase it. Shop a collection of vintage and modern diamond gemstone earrings from some of the world’s top jewelers on 1stDibs.
  • 1stDibs ExpertMarch 22, 2022
    Whether Neil Lane diamonds are GIA-certified or not depends on the piece. All of the diamonds featured in rings and other jewelry designs from the Neil Lane Couture collection do carry GIA certification. Pieces made for third-party retailers may not. On 1stDibs, find a collection of Neil Lane jewelry.