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Loose 3 Carat Sapphire

Purplish Pink Certified Natural Sapphire Earrings Loose Gemstone Pair Set 3 Ct
Purplish Pink Certified Natural Sapphire Earrings Loose Gemstone Pair Set 3 Ct

Purplish Pink Certified Natural Sapphire Earrings Loose Gemstone Pair Set 3 Ct

$978Sale Price / set|30% Off

W 4.8 in D 3.73 in L 7.91 in

Purplish Pink Certified Natural Sapphire Earrings Loose Gemstone Pair Set 3 Ct

Located in Peshawar, PK

Purplish Pink Certified Natural Sapphire Loose Gemstone Pair Set for Earrings, Ring, Necklace

Category

21st Century and Contemporary Tajikistani Contemporary Loose Gemstones

Materials

Sapphire, Pink Sapphire

3 Carat Cushion Greenish Blue Sapphire GIA Unheated
3 Carat Cushion Greenish Blue Sapphire GIA Unheated

3 Carat Cushion Greenish Blue Sapphire GIA Unheated

Located in San Francisco, CA

This Cushion shape 3.01-carat Natural Greenish Blue color sapphire GIA certified has been hand

Category

21st Century and Contemporary Loose Gemstones

Materials

Blue Sapphire

1 1/3 Carat Cushion Blue Sapphire GIA
1 1/3 Carat Cushion Blue Sapphire GIA

1 1/3 Carat Cushion Blue Sapphire GIA

Located in San Francisco, CA

This Cushion shape 1.28-carat Natural Blue color sapphire GIA certified has been hand-selected by

Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Blue Sapphire

1 1/3 Carat Octagonal Blue Sapphire GIA
1 1/3 Carat Octagonal Blue Sapphire GIA

1 1/3 Carat Octagonal Blue Sapphire GIA

Located in San Francisco, CA

This Octagonal shape 1.32-carat Natural Blue color sapphire GIA certified has been hand-selected by

Category

21st Century and Contemporary Nigerian Loose Gemstones

Materials

Blue Sapphire

2 3/4 Carat Cushion Bluish Violet Sapphire GIA
2 3/4 Carat Cushion Bluish Violet Sapphire GIA

2 3/4 Carat Cushion Bluish Violet Sapphire GIA

Located in San Francisco, CA

This Cushion shape 2.74-carat Natural Bluish Violet color sapphire GIA certified has been hand

Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Sapphire

1 1/3 Carat Oval Purple-Pink Sapphire GIA
1 1/3 Carat Oval Purple-Pink Sapphire GIA

1 1/3 Carat Oval Purple-Pink Sapphire GIA

Located in San Francisco, CA

This Oval shape 1.33-carat Natural Purple-Pink color sapphire GIA certified has been hand-selected

Category

21st Century and Contemporary Malagasy Loose Gemstones

Materials

Pink Sapphire

3 1/5 Carat Octagonal Purplish Pink Sapphire GIA
3 1/5 Carat Octagonal Purplish Pink Sapphire GIA

3 1/5 Carat Octagonal Purplish Pink Sapphire GIA

Located in San Francisco, CA

This Octagonal shape 3.21-carat Natural Purplish Pink color sapphire GIA certified has been hand

Category

21st Century and Contemporary Malagasy Loose Gemstones

Materials

Pink Sapphire

1 1/3 Carat Oval Purple-Pink Sapphire GIA
1 1/3 Carat Oval Purple-Pink Sapphire GIA

1 1/3 Carat Oval Purple-Pink Sapphire GIA

Located in San Francisco, CA

This Oval shape 1.34-carat Natural Purple-Pink color sapphire GIA certified has been hand-selected

Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Pink Sapphire

1 1/3 Carat Emerald Shape Teal Sapphire GIA Unheated
1 1/3 Carat Emerald Shape Teal Sapphire GIA Unheated

1 1/3 Carat Emerald Shape Teal Sapphire GIA Unheated

Located in San Francisco, CA

This Emerald shape 1.35-carat Natural Unheated Teal color sapphire GIA certified has been hand

Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Sapphire, Green Sapphire

Natural 3 Carat Burma No Heat Round Cut Blue Sapphire Layout
Natural 3 Carat Burma No Heat Round Cut Blue Sapphire Layout

Natural 3 Carat Burma No Heat Round Cut Blue Sapphire Layout

Located in Kowloon, Hong Kong

Pristine Symphony – Natural Unheated Burmese Sapphire Layout (3 ct Total) A rare convergence of

Category

2010s Loose Gemstones

Materials

Blue Sapphire

1 1/3 Carat Round Purplish Pink Sapphire GIA Unheated
1 1/3 Carat Round Purplish Pink Sapphire GIA Unheated

1 1/3 Carat Round Purplish Pink Sapphire GIA Unheated

Located in San Francisco, CA

This Round shape 1.28-carat Natural Purplish Pink color sapphire GIA certified has been hand

Category

21st Century and Contemporary Malagasy Loose Gemstones

Materials

Pink Sapphire

1 2/3 Carat Oval Light Blue Sapphire GIA Unheated
1 2/3 Carat Oval Light Blue Sapphire GIA Unheated

1 2/3 Carat Oval Light Blue Sapphire GIA Unheated

Located in San Francisco, CA

This Oval shape 1.57-carat Natural Light Blue color sapphire GIA certified has been hand-selected

Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Blue Sapphire

3 3/4 Radiant Orange-Yellow Sapphire GIA
3 3/4 Radiant Orange-Yellow Sapphire GIA

3 3/4 Radiant Orange-Yellow Sapphire GIA

Located in San Francisco, CA

This Radiant shape 3.76-carat Natural Orange-Yellow color sapphire GIA certified has been hand

Category

21st Century and Contemporary Loose Gemstones

Materials

Yellow Sapphire

2 3/4 Carat Oval Light Grayish Blue Sapphire GIA Unheated
2 3/4 Carat Oval Light Grayish Blue Sapphire GIA Unheated

2 3/4 Carat Oval Light Grayish Blue Sapphire GIA Unheated

Located in San Francisco, CA

This Oval shape 2.73-carat Natural Light Grayish Blue color sapphire GIA certified has been hand

Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Blue Sapphire

1 1/3 Carat Oval Zoned Yellow and Blue Sapphire GIA Unheated
1 1/3 Carat Oval Zoned Yellow and Blue Sapphire GIA Unheated

1 1/3 Carat Oval Zoned Yellow and Blue Sapphire GIA Unheated

Located in San Francisco, CA

This Oval shape 1.30-carat Natural Zoned Yellow And Blue color sapphire GIA certified has been hand

Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Blue Sapphire, Yellow Sapphire

11.72 carats Natural rare Zircon 3 Pieces Cut stone for fine jewelry natural gem
11.72 carats Natural rare Zircon 3 Pieces Cut stone for fine jewelry natural gem

11.72 carats Natural rare Zircon 3 Pieces Cut stone for fine jewelry natural gem

Located in Jaipur, RJ

11.72 carats Natural rare Zircon 3 Pieces Cut stone for fine jewelry natural gem Weight - 11.72

Category

21st Century and Contemporary Unknown Art Deco Loose Gemstones

Materials

Aquamarine, Sapphire, Tourmaline

Recent Sales

3 Carat Blue Sapphire Loose Gemstone Pear Shape 8x6mm
3 Carat Blue Sapphire Loose Gemstone Pear Shape 8x6mm

3 Carat Blue Sapphire Loose Gemstone Pear Shape 8x6mm

Located in Columbus, OH

NNJ Designs presents a 3 carat pear shaped Blue Sapphire loose gemstone! This Blue Sapphire

Category

2010s American Loose Gemstones

Materials

Sapphire, Blue Sapphire

Unheated 4.56 ct. Blue Sapphire Oval GIA, Loose 3-Stone Engagement Ring Gemstone
Unheated 4.56 ct. Blue Sapphire Oval GIA, Loose 3-Stone Engagement Ring Gemstone

Unheated 4.56 ct. Blue Sapphire Oval GIA, Loose 3-Stone Engagement Ring Gemstone

By Sarosi By Timeless Gems

Located in Los Angeles, CA

This sapphire is a beautiful, slightly violetish-blue color. It is very brilliant and free from

Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Sapphire, Blue Sapphire

1.17 Carat Oval Blue Sapphire Loose Unset 3-Stone Engagement Ring Gemstone
1.17 Carat Oval Blue Sapphire Loose Unset 3-Stone Engagement Ring Gemstone

1.17 Carat Oval Blue Sapphire Loose Unset 3-Stone Engagement Ring Gemstone

By Sarosi By Timeless Gems

Located in Los Angeles, CA

This petite blue sapphire is a lovely gem at an amazingly affordable price! Weighing 1.17 carats

Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Sapphire, Blue Sapphire

1.10 Carat Oval Pink Sapphire Loose Unset Engagement 3-Stone Ring Gemstone
1.10 Carat Oval Pink Sapphire Loose Unset Engagement 3-Stone Ring Gemstone

1.10 Carat Oval Pink Sapphire Loose Unset Engagement 3-Stone Ring Gemstone

By Sarosi By Timeless Gems

Located in Los Angeles, CA

This sparkling bubblegum pink sapphire has rich color that will make a stunning ring or pendant

Category

21st Century and Contemporary Artisan Loose Gemstones

Materials

Sapphire, Pink Sapphire

Unheated 1.97 Orchid Purple Sapphire Oval GIA, Loose 3-Stone Engagement Gem
Unheated 1.97 Orchid Purple Sapphire Oval GIA, Loose 3-Stone Engagement Gem

Unheated 1.97 Orchid Purple Sapphire Oval GIA, Loose 3-Stone Engagement Gem

By Sarosi By Timeless Gems

Located in Los Angeles, CA

. We have a large selection of loose sapphires in our inventory. Please inquire for details.

Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Sapphire, Pink Sapphire

Unheated 5.84 ct. Ceylon Cornflower Blue Sapphire Round GIA, Unset 3-Stone Ring
Unheated 5.84 ct. Ceylon Cornflower Blue Sapphire Round GIA, Unset 3-Stone Ring

Unheated 5.84 ct. Ceylon Cornflower Blue Sapphire Round GIA, Unset 3-Stone Ring

By Sarosi By Timeless Gems

Located in Los Angeles, CA

. It would be impressive set as a classic 3-stone ring or custom made pendant. The sapphire is

Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Sapphire, Blue Sapphire

2.95 Ct. Pink Sapphire Oval GIA, Unset 3-Stone Engagement Ring or Pendant Gem
2.95 Ct. Pink Sapphire Oval GIA, Unset 3-Stone Engagement Ring or Pendant Gem

2.95 Ct. Pink Sapphire Oval GIA, Unset 3-Stone Engagement Ring or Pendant Gem

By Sarosi By Timeless Gems

Located in Los Angeles, CA

This pretty colored sapphire has a salmon pink hue and weighs 2.95 carats. It is oval shape

Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Sapphire, Pink Sapphire

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Antique Ring 25ct natural Blue Sapphire solid 18K Gold Ø 4.75 US /9.6gr
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Located in SE

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Blue Sapphire, 18k Gold

Certified 3.34 Carat Ceylon Sri Lanka Cushion Natural Blue Sapphire
Certified 3.34 Carat Ceylon Sri Lanka Cushion Natural Blue Sapphire

Certified 3.34 Carat Ceylon Sri Lanka Cushion Natural Blue Sapphire

Located in Jaipur, Rajasthan

Behold the timeless elegance of a 3.34 carat Ceylon Sri Lanka Natural Blue Sapphire, expertly cut into a mesmerizing cushion shape measuring 7.67 by 8.96 by 4.83 millimeters. Sourced...

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21st Century and Contemporary Asian Contemporary Loose Gemstones

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Blue Sapphire

Certified GIA Colombian Emerald Diamond Platinum Three-Stone Ring
Certified GIA Colombian Emerald Diamond Platinum Three-Stone Ring

Certified GIA Colombian Emerald Diamond Platinum Three-Stone Ring

By Dover Jewelry

Located in Miami, FL

Dover Jewelry Present this Stunning Square Colombian Emerald Diamonds handcrafted is solid platinum. Displaying vibrancy and elegance, it is centered with 1 genuine square cut Emeral...

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1.35 Carat Natural Loose Blue Sapphire Oval Shape Gemstone
1.35 Carat Natural Loose Blue Sapphire Oval Shape Gemstone

1.35 Carat Natural Loose Blue Sapphire Oval Shape Gemstone

Located in Peshawar, PK

Loose Blue Sapphire Weight: 1.35 Carats Dimension: 6.7 x 5.5 x 3.8 Mm Origin: Sri Lanka Treatment: Non Certificate: On Customer Demand Shape : Oval Sapphire, a gemstone of legendar...

Category

21st Century and Contemporary Sri Lankan Arts and Crafts Loose Gemstones

Materials

Blue Sapphire

Emilio Jewelry GIA Certified 7.02 Carat Natural Blue Diamond Ring
Emilio Jewelry GIA Certified 7.02 Carat Natural Blue Diamond Ring

Emilio Jewelry GIA Certified 7.02 Carat Natural Blue Diamond Ring

By Emilio!

Located in New York, NY

From the museum vault at Emilio Jewelry New York, One of the rarest and only diamonds of its size and color. Please inquire for details.

Category

21st Century and Contemporary Three-Stone Rings

Materials

Blue Diamond

5.03 Carat Royal Blue Sapphire Cushion Three Stone Platinum Engagement Ring
5.03 Carat Royal Blue Sapphire Cushion Three Stone Platinum Engagement Ring

5.03 Carat Royal Blue Sapphire Cushion Three Stone Platinum Engagement Ring

By Merkaba

Located in Beverly Hills, CA

Magnificent 5.03ct Royal Blue Sapphire Platinum Engagement Three Stone Diamond Ring by Merkaba Jewelry Beverly Hills. Merkaba Jewelry Beverly Hills proudly presents this magnificent...

Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, White Diamond, Multi-gemstone, Sapphire, Blue Sapphire, Platinum

Certified 3.24 Carat Faceted Blue Sapphire Oval Shape Gemstone
Certified 3.24 Carat Faceted Blue Sapphire Oval Shape Gemstone

Certified 3.24 Carat Faceted Blue Sapphire Oval Shape Gemstone

Located in Peshawar, PK

Loose Blue Sapphire Weight: 3.24 Carats Dimension: 9.8 x 7.9 x 4.5 Mm Origin: Sri Lanka Treatment: Heated Certificate: Available Sapphire, a gemstone of legendary beauty and end...

Category

21st Century and Contemporary Sri Lankan Arts and Crafts Loose Gemstones

Materials

Blue Sapphire

31.10Ct Natural Sapphire and Diamond 14K Solid White Gold Necklace
31.10Ct Natural Sapphire and Diamond 14K Solid White Gold Necklace

31.10Ct Natural Sapphire and Diamond 14K Solid White Gold Necklace

Located in Los Angeles, CA

31.10Ct Natural Sapphire and Diamond 14K Solid White Gold Necklace Natural Oval Sapphires Weights: Approx. 28.90 Carats (57 Sapphires) Sapphire Measures: Approx. 5 x 4-9 x 4 mm To...

Category

2010s American Drop Necklaces

Materials

Diamond, Sapphire, Blue Sapphire, White Gold, 14k Gold

17 Carat Collector's Cambodian Blue Zircon
17 Carat Collector's Cambodian Blue Zircon

17 Carat Collector's Cambodian Blue Zircon

$6,375Sale Price|25% Off

W 0.5 in D 0.41 in L 0.51 in

17 Carat Collector's Cambodian Blue Zircon

Located in Hua Hin, TH

Collectors Item: 17.03 carat Natural Blue Zircon from Ratanakiri, Cambodia. Blue zircons this high quality we have decided to give the title of 'Azure Blue' due to it being imbued wi...

Category

2010s Cambodian Loose Gemstones

Materials

Zircon, Blue Zircon

Tiffany & Co., 5.06 Carats Diamond Engagement Ring
Tiffany & Co., 5.06 Carats Diamond Engagement Ring

Tiffany & Co., 5.06 Carats Diamond Engagement Ring

By Tiffany & Co.

Located in Chicago, IL

This beautiful engagement ring crafted by Tiffany & Co. boasts one emerald cut diamond weighing 5.06 carats with F color, VS2 clarity, surrounded by 28 calibre cut baguettes weighing...

Category

21st Century and Contemporary American Modern Engagement Rings

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Diamond, Platinum

Natural Green Mozambique Paraiba Tourmaline Stone 0.60 carats with GIA Report
Natural Green Mozambique Paraiba Tourmaline Stone 0.60 carats with GIA Report

Natural Green Mozambique Paraiba Tourmaline Stone 0.60 carats with GIA Report

Located in Los Angeles, CA

Mozambique is a country located in Africa. It has so many natural jewels that are truly breathtaking and elegant. Natural Mozambique Tourmaline 0.60 carats with GIA Report is one of ...

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21st Century and Contemporary Mozambican Loose Gemstones

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Tourmaline, Paraiba

Vivid Blue Natural Ceylon Sapphire Ring Loose Gemstone 1.34 Ct Oval Cut-Jewelry
Vivid Blue Natural Ceylon Sapphire Ring Loose Gemstone 1.34 Ct Oval Cut-Jewelry

Vivid Blue Natural Ceylon Sapphire Ring Loose Gemstone 1.34 Ct Oval Cut-Jewelry

$1,799Sale Price|20% Off

W 0.23 in D 0.17 in L 0.25 in

Vivid Blue Natural Ceylon Sapphire Ring Loose Gemstone 1.34 Ct Oval Cut-Jewelry

Located in Peshawar, PK

Vivid Blue Natural Sapphire Loose Gemstone for Ring, Necklace Pendant or any other Jewelry Setting Oval Cut from Sri Lanka (Ceylon)!! 💎 GEMSTONE TYPE: Sapphire ⚖️ WEIGHT: 1.34 Cara...

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21st Century and Contemporary Sri Lankan Contemporary Loose Gemstones

Materials

Sapphire

GIA Certified Deep Blue Sapphire 4.01 Ct Cushion Loose Gemstone
GIA Certified Deep Blue Sapphire 4.01 Ct Cushion Loose Gemstone

GIA Certified Deep Blue Sapphire 4.01 Ct Cushion Loose Gemstone

Located in Fort Lee, NJ

This beautiful natural sapphire displays a deep, velvety blue tone, comparable to what the trade refers to as Royal Blue. While the GIA report does not specify the color term, the st...

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2010s Sri Lankan Loose Gemstones

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Blue Sapphire

5.12 Carat Cushion Blue Sapphire Diamond Three-Stone Engagement Ring in Platinum
5.12 Carat Cushion Blue Sapphire Diamond Three-Stone Engagement Ring in Platinum

5.12 Carat Cushion Blue Sapphire Diamond Three-Stone Engagement Ring in Platinum

Located in NEW YORK, NY

Showcases a Cushion cut, Vibrant color Blue Sapphire weighing 5.12 carats, flanked by two brilliant cut half moon diamonds weighing 0.89 carats total. Elegantly set in a polished pla...

Category

21st Century and Contemporary Modern Three-Stone Rings

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Diamond, Blue Sapphire, Platinum

4.15 Carat GIA Certified Ceylon Sapphire & Diamond Three Stone Ring in Platinum
4.15 Carat GIA Certified Ceylon Sapphire & Diamond Three Stone Ring in Platinum

4.15 Carat GIA Certified Ceylon Sapphire & Diamond Three Stone Ring in Platinum

Located in Great Neck, NY

GIA certified cushion cut Ceylon Sapphire weighing 4.15 carats Measuring (9.40x9.04x5.48) mm Two pieces of cadillac diamonds weighing .68 carats Diamonds are graded GH-VS Set in plat...

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2010s American Modern Cocktail Rings

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Emilio Jewelry Gia Certified 3.00 Carat Fancy Blue Diamond Ring
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Emilio Jewelry Gia Certified 3.00 Carat Fancy Blue Diamond Ring

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Located in New York, NY

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Loose 3 Carat Sapphire For Sale on 1stDibs

Surely you’ll find the exact loose 3 carat sapphire you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Frequently made of 18k Gold, Gold and Platinum, this item was constructed with great care. Our collection of these items for sale includes 6 vintage editions and 65 modern creations to choose from as well. Making the right choice when shopping for a loose 3 carat sapphire may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 20th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. As it relates to this specific piece, our collection includes designs that are universally popular, but 1 Carat and 1.5 Carat carat weights, specifically, are sought with frequency. A loose 3 carat sapphire from Sarosi By Timeless Gems, Fine Jewels UK and Merkaba — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for an oval cut iteration of this accessory, while there are also cushion cut cut and heart cut cut versions available here, too. When shopping for a loose 3 carat sapphire, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Loose 3 Carat Sapphire?

On average, a loose 3 carat sapphire at 1stDibs sells for $2,160, while they’re typically $276 on the low end and $235,600 for the highest priced versions of this item.

The Legacy of Sapphire in Jewelry Design

On 1stDibs, shop the bright blue gems that star in sapphire rings, sapphire necklaces and other vintage and antique sapphire jewelry

Sapphires — the stone of choice for Napoleon, Princess Diana and Elizabeth Taylor — have been a favorite of aristocrats and the well-to-do since the time of the Ancient Greeks.

Picture a sapphire. If the stone you conjure is a deep cornflower blue, you’re seeing only part of the picture. Although blue Kashmirs are considered the most valuable, sapphires come in every color except red. No matter the hue, this very special gem is rich in history and beloved by royals (FYI, Princess Diana and Kate Middleton share an 11-carat sapphire engagement ring), so September babies are in very noble company.

America’s version of royalty — old money and celebrities — have also shown a predilection for the blue stones. In 1940, John D. Rockefeller Jr. had Cartier mount a 62-carat sapphire he had bought from an Indian maharajah in a brooch for his first wife, Abby Aldrich Rockefeller; in 2001, the piece sold for a then-record of $3,031,000 at Christie’s New York.

The grand dame of jewelry, Elizabeth Taylor had a passion for the gems that her lovers were happy to indulge. Second husband Michael Wilding gave her an engagement ring set with a cabochon sapphire, while Richard Burton famously presented her with a BVLGARI sautoir set with diamonds and sapphires, including at its center a cabochon Burmese weighing 52.72 carats. One of the star lots in the sale of Taylor’s jewels at the Christie’s New York in 2011, it sold for $5,906,500.

You don’t have to have blue blood or a bulging bank account, however, to get an eyeful of this much-coveted gem. A number of outstanding examples reside in public collections.

The Smithsonian Museum of Natural History owns the 423-carat Logan sapphire, a gift from the Guggenheim family, and the Hall sapphire and diamond necklace, designed by Harry Winston and featuring 36 fine, well-matched cushion-cut Sri Lankan sapphires weighing a combined 195 carats. Also in the collection is the Bismarck sapphire necklace, designed by Cartier and sporting a central sapphire weighing 98.6 carats, which Mona Von Bismarck donated to the museum.

Sapphires are composed of corundum. Their color derives from trace elements, such as iron, titanium, chromium, copper or magnesium. When the trace element produces a ruby hue, the stone is called, what else, a ruby. (which is, as mentioned above, why sapphires cannot be red by definition).

The allure of large gemstones endures throughout the periods characterized as vintage, and sapphire features frequently in vintage engagement rings. (On 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings.)  

Find an exquisite collection of vintage and antique sapphire jewelry on 1stDibs.

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.