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Type 2a Diamond

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Emilio Jewelry GIA Certified 14.00 Carat D Flawless Type 2 A Diamond Ring
By Emilio!
Located in New York, NY
From the Museum vault at Emilio Jewelry, Located On New York’s Iconic Fifth Avenue: Showcasing a
Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond

GIA Certified Rare Emerald Cut Type IIA Golconda Diamond Ring 2.01ct D/Flawless
Located in London, GB
structure and represents less than 2% of all diamonds mined worldwide. The 2mm ring is currently a size UK M
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

10.16 Carat Diamond Platinum Ring, GIA Certified Type 2a
Located in Beverly Hills, CA
by the GIA as natural and being a rare type 2a. This means the stone is extremely pure without any
Category

21st Century and Contemporary American Fashion Rings

Materials

Diamond, Platinum

Exceptional GIA Certified 6 Carat Flawless Type 2A Emerald Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
Exceptional GIA Certified 6 Carat Flawless Type 2A Emerald Cut Diamond Ring
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, Emerald, Platinum

Type 2A Golconda GIA Certified 10 Carat Emerald Cut Diamond Solitaire Ring
By Antinori Fine Jewels
Located in Rome, IT
opulence and elegance. Crafted with meticulous attention to detail, this Golconda Type IIA diamond is set
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Emerald, Platinum

Rare GIA Certified Type 2A I Flawless 6.00 Carat Natural Pink Oval Diamond Ring
Located in Tustin, CA
. Hallmarked 750 for 18 karat gold. PD (Pink Diamond) 5.01 ct and 2 D (Half-Moon Diamonds) 0.45 ct. Ring is a
Category

21st Century and Contemporary American Artisan Solitaire Rings

Materials

Diamond, Pink Diamond, 18k Gold, Rose Gold, White Gold

TYPE IIA Golconda type GIA Certified 12 Carat Oval Diamond Pave Ring
By Antinori Fine Jewels
Located in Rome, IT
round brilliant cut diamonds with a total approximate carat weight of 2 carats with a respective color
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

'The Rose Diamond' - Type 11a Natural Pink Pear Shaped Diamond Ring
By Simon Ardem
Located in New York, NY
certified with a GIA certificate; no.5182332500, which also includes a GIA Type IIa certificate. Type 11a
Category

21st Century and Contemporary American Contemporary Bridal Rings

Materials

Diamond, White Diamond, Pink Diamond, Platinum

Vivid Diamonds GIA Certified 7.23 Carat Emerald Cut Diamond Engagement Ring
By Vivid Diamonds
Located in Miami, FL
exquisite internally flawless diamond is a Type IIa diamond, meaning that this diamond contains little, if
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

Diamond Two-Tone Cross over Fashion Gold Ring
By Prince Diamond
Located in New York, NY
Cts. Diamond Color: G+ Diamond Clarity: SI1+ 3/8" width means a little shorter than 1/2"
Category

21st Century and Contemporary American Modern Fashion Rings

Materials

Diamond, 18k Gold

Certified Natural Type A Jadeite Jade Diamond Gold Brooch Pin
Located in New York, NY
18k gold brooch, set with 2.40ctw in diamonds, and certified carved natural no resin type A jadeite
Category

20th Century Brooches

Materials

Diamond, Jade, Gold

Certified Type A Jade Diamond Pendant Necklace, Apple Green Patches, Reversible
Located in Hong Kong, HK
Here is a natural Jadeite Jade and diamond pendant with excellent apple green patches covering
Category

2010s Hong Kong Pendant Necklaces

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Type A Jadeite Jade Diamond Pendant Drop Necklace, Imperial Green
Located in Hong Kong, HK
Here is a natural Jadeite Jade and diamond pendant with excellent best imperial green color. It is
Category

2010s Hong Kong Pendant Necklaces

Materials

White Diamond, Jade, Diamond, Gold, 18k Gold, White Gold

Certified Type A Jadeite Jade Ingot & Diamond Cocktail Ring, Imperial Green
Located in Hong Kong, HK
mesmerizing glow! Here is an imperial green Jade and diamond ring. It is certified by 2 labs natural jadeite
Category

2010s Hong Kong Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Jade, White Gold, Gold, 18k Gold

GIA Certified 6.51 Carat Natural Pear Brilliant Cut Diamond Ring TYPE IIA
By Antinori Fine Jewels
Located in Rome, IT
GIA Certified 6.51 Carat Natural Pear Brilliant Cut Diamond. This Beautiful Diamond has a Maximum
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

Certified Natural Type A Jadeite Jade And Diamond Earrings. Apple Green Color
Located in Hong Kong, HK
earring is about 12mm. The earrings are set in 18k white gold and diamonds. There are 2 diamonds in the
Category

2010s Hong Kong Stud Earrings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Type A Jadeite Jade Diamond Pendant Drop Necklace, Apple Green Veins
Located in Hong Kong, HK
Here is a natural Jadeite Jade and diamond pendant with excellent apple green veins running through
Category

2010s Hong Kong Pendant Necklaces

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Natural Type A Jadeite Jade And Diamond Earrings. Imperial Green Color
Located in Hong Kong, HK
diamonds. There are 2 diamonds in the middle of each jade totaling 0.08cts. The untreated / un-enhanced
Category

2010s Hong Kong Stud Earrings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

2.55 Carat D IF Type IIA GIA Certified Diamond Platinum Engagement Ring
By Rive Gauche Jewelry
Located in New York, NY
The perfect diamond, a round brilliant cut weighing 2.56 carats with the highest color and clarity
Category

2010s American Solitaire Rings

Materials

Diamond, Platinum

2 Carat Marquise Cut Diamonds Set in a 14k Yellow Gold Setting
By Gregory Mikaelian & Sons, Inc.
Located in Los Angeles, CA
2.00 CARAT MARQUISE DIAMONDS BAND RING IN 14K YELLOW GOLD 6.75US Specifications: main stone
Category

21st Century and Contemporary American Contemporary Bridal Rings

Materials

Diamond, 14k Gold, Yellow Gold

Certified Natural Type A Jadeite Jade Dragon Disc & Rose Cut Diamond Earrings
Located in Hong Kong, HK
gold, and 2 new rose cut diamonds. The 2 new rose cut diamonds total 0.37 cts (about 0.185 cts each
Category

2010s Hong Kong Lever-Back Earrings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Type A Icy Jade & Diamond Pendant Necklace, Glowing Apple Green Color
Located in Hong Kong, HK
transparency! Here is a natural apple green Jade and diamond pendant. It is certified by 2 labs. The pendant is
Category

2010s Hong Kong Pendant Necklaces

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Natural Type A Icy Jade Peapod Diamond Earrings, Glowing Apple Green
Located in Hong Kong, HK
These icy jade apple green earrings are certified by 2 labs. Here is a nice pair of apple green
Category

2010s Hong Kong Clip-on Earrings

Materials

White Diamond, Jade, Diamond, Gold, 18k Gold, White Gold

Certified Type A Icy Jade Gourd Diamond Pendant Necklace, Intense Apple Green
Located in Hong Kong, HK
Please check out the HD video! Here is a natural icy Jadeite Jade and diamond pendant with
Category

2010s Hong Kong Pendant Necklaces

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Natural Type A Icy Peapod Jade Diamond Earrings, Intense Apple Green
Located in Hong Kong, HK
These icy jade intense apple green earrings are certified by 2 labs. Here is a nice pair of intense
Category

2010s Hong Kong Stud Earrings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Type A Jadeite Jade Diamond Pendant Drop Necklace, Apple Green Color
Located in Hong Kong, HK
Here is a natural apple green Jade and diamond pendant. It is certified. The pendant is set in 18k
Category

2010s Hong Kong Pendant Necklaces

Materials

White Diamond, Diamond, Jade, Gold, 18k Gold, White Gold

Certified Natural Type A Jadeite Jade & Diamond Cocktail Ring, Apple Green Color
Located in Hong Kong, HK
Please check out the HD video! THIS JADE GLOWS! Here is an apple green Jade and diamond ring. It is
Category

2010s Hong Kong Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Type A Jadeite Jade and Diamond Cocktail Ring, Best Imperial Green
Located in Hong Kong, HK
ring. It is certified by 2 labs natural jadeite jade. The ring is set in 18k white gold and diamonds
Category

2010s Hong Kong Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Jade, Gold, White Gold, 18k Gold

Certified Type A Jadeite Jade and Diamond Cocktail Ring, Best Imperial Green
Located in Hong Kong, HK
ring. It is certified by 2 labs natural jadeite jade. The ring is set in 18k white gold and diamonds
Category

2010s Hong Kong Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Eostre Type A Yellow Jadeite and Diamond Ring in 18k White Gold
Located in Melbourne, AU
A type A yellow jadeite and diamond ring in 18k white gold. The yellow jadeite cabochon is secured
Category

2010s Australian Contemporary Cocktail Rings

Materials

Diamond, Jade, 18k Gold, White Gold

Important Certified Type-A Icy Jade, Ruby and Diamond Earrings, Imperial Green
Located in Hong Kong, HK
and diamond goldfish stud / drop earrings. It is certified by 2 labs. Both earrings are set in 18k
Category

2010s Hong Kong Drop Earrings

Materials

Sapphire, Blue Sapphire, Ruby, Diamond, White Diamond, Jade, Rose Gold, ...

Eostre Type A Vivid Green Jadeite and Diamond Ring in Platinum 950
Located in Melbourne, AU
Simple and Chic design with 7 Vivid Green Jadeite Cabochon surrounded by diamond pave on a
Category

2010s Australian Contemporary Cluster Rings

Materials

Diamond, Jade, Platinum

Eostre Freshwater Pearl, Amethyst, Type A Jadeite and Diamond White Gold Ring
Located in Melbourne, AU
on top of a present. A 13.6 mm Lavender Colour Freshwater Pearl, Amethyst, Type A Natural Jadeite
Category

2010s Australian Contemporary Cocktail Rings

Materials

Amethyst, Diamond, Freshwater Pearl, 18k Gold

Eostre Ruby, Type A Jadeite and Diamond Pendant in 18k Yellow Gold
Located in Melbourne, AU
2 diamonds set between each green Jadeite and ruby. At the base of the pearl is a circle of diamond
Category

2010s Oceanic Contemporary Pendant Necklaces

Materials

Diamond, South Sea Pearl, Ruby, 18k Gold, Yellow Gold

Certified Type a Jade & Oval Diamond 3 Stone Ring, Glowing Apple Green Color
Located in Hong Kong, HK
certified natural jadeite jade. The ring is set in 18k white gold and diamonds. There are 2 round brilliant
Category

2010s Hong Kong Contemporary Three-Stone Rings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Certified Natural Type A Icy Peapod Jade and Diamond Earrings, Apple Green Color
Located in Hong Kong, HK
These icy jade apple green earrings are certified by 2 labs. Here is a nice pair of apple green icy
Category

2010s Hong Kong Stud Earrings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

Type A Jadeite Jade Drop Earrings / Pendants Rubies OMC Diamond and Sapphires
Located in Hong Kong, HK
) made with blue sapphires, rubies and old mine cut and old rose cut diamonds. 2 Blue sapphires 0.81Cts
Category

2010s Hong Kong Drop Earrings

Materials

Diamond, Jade, Ruby, Sapphire, Blue Sapphire, 18k Gold, Rose Gold, White...

Certified Type A Jadeite Jade and Diamond Cocktail Ring, Close to Imperial Jade
Located in Hong Kong, HK
THIS JADE GLOWS! Here is a bright apple green oval high domed cabochon jade and diamond ring. This
Category

2010s Hong Kong Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Jade, 18k Gold, White Gold, Gold

Certified Type A Icy Apple Green Jadeite Jade and Diamond Ring, Super Glow
Located in Hong Kong, HK
THIS JADE GLOWS! Here is super bright apple green round high domed cabochon jade and diamond ring
Category

2010s Hong Kong Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Jade, Gold, 18k Gold, White Gold

TYPE IIA IF GIA Certified 2 Carat Halo Oval Diamond White Gold Ring
By Antinori Fine Jewels
Located in Rome, IT
This captivating ring showcases a striking GIA-certified 2-carat oval diamond Type IIA! It
Category

2010s Unknown Contemporary Solitaire Rings

Materials

Diamond, Platinum

Light Lavender Color Type A Jadeite and Diamond Ring in 18k Yellow Gold
Located in Melbourne, AU
A light lavender colour type A jadeite and diamond ring in 18k yellow gold. The jadeite is in the
Category

2010s Australian Contemporary Cocktail Rings

Materials

Diamond, Jade, 18k Gold, Yellow Gold

GIA Certified 18.95 Carat Internally Flawless Type II-A Heart-Cut Diamond Ring
By Gad & Co.
Located in Miami, FL
This 18.95 Carat, Internally Flawless Type II-A Heart-Shape Diamond is the archetype of luxury. It
Category

2010s Hong Kong Modern Three-Stone Rings

Materials

Diamond, 18k Gold, White Gold

Eostre Type A Yellow Jadeite, Yellow and White Diamond Earring in 18K Gold
Located in Melbourne, AU
and Yellow Diamonds. This is a very modern and bold design perfect for those who wants to show their
Category

2010s Australian Contemporary Dangle Earrings

Materials

White Diamond, Jade, White Gold, 18k Gold

Eostre Akoya Pearl, Type A Green & White Jadeite and Diamond Earring in 18K Gold
Located in Melbourne, AU
Diamond clustered Type A green Jadeite. The Akoya pearl is then connected by the almost transparent white
Category

2010s Australian Contemporary Dangle Earrings

Materials

Diamond, Jade, Pearl, 18k Gold, White Gold

1.302 Carat Natural 'Type-A' Jadeite and Rose Cut Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful Ring featuring a 1.302 Carat, Natural, Non-dyed Jadeite and 0.50 Carats of Diamond
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Jade, Platinum

EOSTRE Type A Light Green Jadeite, Ruby and Diamond Ring in 18K White Gold
Located in Melbourne, AU
This is a flower motif Type A Jadeite, Ruby and Diamond ring in 18K White Gold. The almost
Category

2010s Australian Contemporary Cocktail Rings

Materials

Diamond, Jade, Ruby, 18k Gold, White Gold

"Art Deco Style" Earrings 14k White Gold with 2 Assher Cut Diamonds in a Halo
By Gregory Mikaelian & Sons, Inc.
Located in Los Angeles, CA
stone: 2 assher cut diamonds carat total weight: .1.04pts. color:G clarity:VS
Category

2010s American Retro Drop Earrings

Materials

Diamond, 14k Gold, White Gold

18KW Ring with Type A Jadeite Jade Cabochon Cut Triangle Shape and Diamond Halo
By Gad & Co.
Located in Miami, FL
Cabochon Cut Kite/Triangle Shaped Type A Jadeite Jade in a 3-prong 18k white gold ring setting
Category

2010s Asian Art Deco Cocktail Rings

Materials

Diamond, Jade, 18k Gold, White Gold

Eostre Type A Natural Lavender Jadeite Jade, Ruby and Diamond Ring in 18K Gold
Located in Melbourne, AU
The Type A Lavender Jadeite Cabochon is sitting in the middle of a flower motif, with petals
Category

2010s Australian Contemporary Cluster Rings

Materials

Diamond, Jade, Ruby, 18k Gold, Yellow Gold

Australian Solid 12.63ct Black Opal Type 1 & Diamond Ring in 18K Rose Gold + GSL
Located in MELBOURNE, AU
precious black N1 (boasting a black body tone) - which is one of the most valuable type of opal
Category

Vintage 1980s Australian Retro Cocktail Rings

Materials

Black Opal, Opal, Diamond, Rose Gold, 18k Gold

9.40 Carat Type A Fei Cui Jadeite Jade and Diamond Ring in Textured 18K Gold
By Gad & Co.
Located in Miami, FL
color and luster. Adorned with 2 round cut diamonds of 0.15 carats total. Featuring a textured gold line
Category

21st Century and Contemporary North American Contemporary Fashion Rings

Materials

Diamond, Jade, Gold, 18k Gold, Yellow Gold

Eostre Type A Natural Green Jadeite, Yellow and White Diamond Ring in 18K Gold
Located in Melbourne, AU
the Jadeite Cabochon is then covers by 2 lines of diamond pave resembling the eye lids. This is a big
Category

2010s Australian Contemporary Cocktail Rings

Materials

White Diamond, Jade, 18k Gold, White Gold, Yellow Gold

Certified 59.5 Cts Type A Icy Jadeite Jade Cupid / Angel Drop Pendant Necklace
Located in Hong Kong, HK
necklace It is certified by 2 labs. The icy jade is a carving of cupid "the god of love" It also looks like
Category

2010s Hong Kong Pendant Necklaces

Materials

Diamond, Jade, White Diamond, Gold, 18k Gold, Yellow Gold

Natural Myanmar Icy Type Jadeite Guan Gong Guan Yu Pendant, God of Righteous
Located in Kowloon, HK
This jade pendant is 100% natural, untreated, and undyed Type-A Myanmar jadeite jade. It is hand
Category

Early 2000s Hong Kong Medieval Pendant Necklaces

Materials

Diamond, Jade, 18k Gold

79.88 Ct Natural Myanmar Lavender Honey Yellow Icy Type Monkey Jadeite Pendant
Located in Kowloon, HK
. ◆ GEMSTONE: Type A Natural Jadeite & diamond (4 pcs) ◆ PRECIOUS METAL: 18K White Gold ◆ ORIGIN: Myanmar
Category

2010s Asian Arts and Crafts Pendant Necklaces

Materials

Jade

Diamond Earrings
Located in Kowloon, HK
**100% NATURAL FANCY COLOUR DIAMOND JEWELRY** ✪ Jewelry Details ✪ Pear FY VVS VS Diamonds - 2 pcs
Category

2010s Asian Dangle Earrings

Materials

Diamond, Yellow Diamond, 18k Gold

Diamond Earrings
Diamond Earrings
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Diamond Earrings
Located in New York, NY
Diamond Earrings. A pair of earrings consisting of 2 large round cut center diamonds, surrounded
Category

20th Century Unknown Clip-on Earrings

Materials

Diamond, Platinum

Diamond Earrings
Diamond Earrings
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Aquamarine & Diamond Earrings
Located in New York, NY
Aquamarine & Diamond Earrings A pair of platinum earrings set with 2 emerald cut aquamarines and
Category

Vintage 1950s Clip-on Earrings

Materials

Aquamarine, Diamond, Platinum

Aquamarine & Diamond Earrings
Aquamarine & Diamond Earrings
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Yellow Diamond Earrings
Located in Kowloon, HK
certified Diamond 2- ➛ Stone Shape: Oval ➛ Stone Color: W to X Range ➛ Stone Clarity: SI1 ➛ Stone Weight
Category

2010s Asian Stud Earrings

Materials

Diamond, Yellow Diamond, 18k Gold, White Gold

Diamond Bow Earrings
Located in New York, NY
Diamond Bow Earrings A large pair of diamond earrings set with two center old cut diamonds and
Category

20th Century Unknown Retro Dangle Earrings

Materials

Diamond, 18k Gold

Diamond Bow Earrings
Diamond Bow Earrings
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Type 2a Diamond For Sale on 1stDibs

On 1stDibs, you can find the most appropriate type 2a diamond for your needs in our varied inventory. Each design created in this style — which was crafted with great care and often made from 18k Gold, Gold and Platinum — can elevate any look. Our collection of these items for sale includes 1 vintage editions and 13 modern creations to choose from as well. If you’re looking for a type 2a 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 20th Century while another version may have been produced as recently as the 21st Century. For this particular piece, 1.5 Carat and 2 Carat are consistently popular carat weights. A type 2a diamond from Antinori Fine Jewels, David Rosenberg and Tamir — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for an emerald cut iteration of this accessory, while there are also oval cut cut and pear cut cut versions available here, too. There aren’t many items for men if you’re seeking a type 2a diamond, as most of the options available are for women and unisex.

How Much is a Type 2a Diamond?

The price for a type 2a diamond starts at $23,997 and tops out at $2,600,000 with these rings, on average, selling for $585,000.
Questions About Type 2a Diamond
  • 1stDibs ExpertApril 5, 2022
    The difference between Type I and Type II diamonds is their composition. Type I diamonds contain nitrogen-based impurities, while Type II diamonds do not feature these types of impurities. You'll find a large collection of diamond gemstone jewelry on 1stDibs.
  • 1stDibs ExpertOctober 12, 2021
    Type lla diamonds have no boron or nitrogen impurities and have a high thermal conductivity. They are chemically pure and are often colorless. Type lla diamonds can also be light pink, gray, light yellow, or light brown. Find a wide range of diamond jewelry on 1stDibs today.
  • 1stDibs ExpertApril 26, 2024
    The four types of diamonds are natural, lab-grown, treated and natural fancy-colored. Natural diamonds are those derived from mines, while lab-grown diamonds are human-made. A treated diamond comes from a mine but then undergoes an enhancement process to improve its appearance. Diamonds in colors other than white that come from mines rather than laboratories are naturally fancy-colored. On 1stDibs, find a wide range of diamond jewelry.
  • 1stDibs ExpertNovember 1, 2023
    While there are many, many types of known diamond cuts, we can say definitively that the cuts fall into three main categories. The three categories of gemstone cuts are brilliant, step and mixed. Popular types of gemstone cuts include round brilliant, cushion cut, baguette cut and princess cut. When shopping for a piece of jewelry, consider whether you want stones to sparkle and gleam or show off their color with clarity. Then, find the cut on the list that enhances the desired feature.
  • 1stDibs ExpertNovember 8, 2023
    What type of diamond stud earring is the best depends on your preferences, as there isn't a single cut that is better than the others. If you like the look of sparkling studs, consider brilliant cuts like the round, heart and arrow, princess, oval, pear or marquise. Stepped cuts like the emerald, cushion and Asscher let the color and clarity of diamonds show through and can also be appealing choices. Shop a variety of diamond stud earrings on 1stDibs.
  • 1stDibs ExpertAugust 24, 2021
    A 2 carat oval diamond is approximately 10.23mm × 6.82mm × 4.16mm in size. These diamonds usually have an approximate face-up area of 57.21 mm². Find a variety of diamonds on 1stDibs.
  • 1stDibs ExpertNovember 1, 2023
    Whether two-carat diamond studs are too big is a matter of personal preference. At this size, each earring will be one carat. If you opt for the classic round brilliant cut, the studs will typically measure around 6.5 millimeters in diameter, which is a little more than half the size of a dime. Find a wide range of diamond stud earrings on 1stDibs.
  • 1stDibs ExpertNovember 8, 2023
    How big a 2-carat diamond with a princess cut is varies from piece to piece. However, the average size is 7 millimeters by 7 millimeters. The measurement is around 9/32 inches, so a 2-carat princess-cut diamond will be just a little over a quarter-inch in size. On 1stDibs, find an assortment of princess-cut diamond jewelry.