Loose Diamonds
loose diamonds — pre-owned
Browse 3,657 loose diamonds — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.
Loose IGI Lab Grown Round Brilliant Diamond 3.39ct G VS1 Ideal Cut
The product is a 3.39ct G VS1 Ideal Cut lab-created round brilliant diamond from CVD. It has a transparent clarity, ideal cut grade, and is certified by IGI. The diamond is not enhanced and has a faint colored diamond intensity, with a G color grade. It is a single piece with dimensions of 9.67mm in length, 9.75mm in width, and 5.81mm in depth. This high-quality diamond is perfect for jewelry and gemstone applications.
MELANGE LOT OF 75 RD BRILLIANT CUT Diamonds 6.40cttw HI-J RANGE SI3-I1 BARGAIN!
ROUND BRILLIANT CUT DIAMONDS. GENUINE AUTHENTIC ROUND BRILLIANT. CUT NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. LIQUIDATION PRICED; WAY,WAY BELOW MARKET WHOLESALE VALUES!
Lot of 8 Marquise CUT Diamonds 0.99cttw FG SI2SI3 0.07 TO 0.14ct sizes EXCELLENT
MARQUISE CUT DIAMONDS. GENUINE AUTHENTIC MARQUISE. CUT NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. THIS LOT IS FROM MANUFACTURERS' PRODUCTION INVENTORY.
12.65ctw Natural Diamonds Lot
12.65 Total Carat Weight All Natural Diamonds Single cuts , brilliant cuts, baguette, mine cut Colorless / brown / champagne/ yellowish Many have chips/damaged and many are in the I1-I2 range Biggest stone is 0.40ct
1.45 carat natural loose diamond certified
1.45 carat GIA Certified natural round (brilliant) loose diamond, E color, SI1 clarity, Very Good cut, Good polish, Good symmetry, NO fluorescence. Comes with a yellow gold ring (4 white gold prongs) and GIA Certificate.
Loose IGI Lab Grown Oval Brilliant Diamond 1.88ct G VS1
The product is a 1.88ct oval brilliant lab-grown diamond with an excellent cut grade and faint colored diamond intensity. It has a transparent clarity grade of VS1 and a color grade of G. The diamond is from India and has not been enhanced. It comes with an IGI certification and has a total carat weight of 1.88. With dimensions of 9.89 × 6.94 × 4.35 mm, this loose diamond is ideal for use in jewelry and gem projects.
1.06 Ct Oval Cut Fancy Vivid Pink Color SI1 Clarity Lab Grown Diamond
The product is a 1.06 carat oval cut fancy vivid pink color lab grown diamond with SI1 clarity. This polished diamond is created in a lab and has a fancy vivid color intensity, making it a unique and eye-catching piece. With a wholesale price, this diamond is a desirable choice for jewelry enthusiasts looking for a high-quality, colorful gemstone that is both elegant and affordable.
4.08CT Heart Brillian F VVS2 IGI Certified Loose Diamond Lab Grown CVD
4.08 CT Heart Brillant F VVS2 IGI Certified Loose Diamond Lab Grown CVD .
Natural Princess Cut Diamond Fancy Brown 2.142ct I-1
Perfect for the woman who doesn’t concern herself with what every other woman is wearing because she’s unlike any other woman. she’s keenly aware of that which is genuine and what is real. real is deep.
0.18 Carat J VS2 Round Brilliant Natural Enhanced MINED Loose Diamond 3.55mm
0.18 Carat J VS2 Round Brilliant Natural Enhanced MINED Loose Diamond 3.55mm.
Loose IGI Certified Lab-Grown Diamond 1.96ct E VS1 Square Emerald Cut
The product is a 1.96ct lab-grown diamond with a square emerald cut, measuring 6.91 × 6.86 × 4.49 mm. This transparent diamond has excellent cut quality and a VS1 clarity grade, making it a desirable gemstone for jewelry making. It is certified by IGI and has a diamond color grade of E, ensuring its high quality and authenticity. The diamond has not undergone any enhancement treatments and is a single piece, ideal for creating stunning and unique jewelry pieces.
Natural Diamond, 0.16 ct, Approx. 3.3 mm, Jewelry Remover d0017
Natural Diamond, 0.16 ct, Approx. 3.3 mm, Jewelry Remover d0017. the stone type, whether natural or synthetic, has not been verified by a third-party appraisal agency. These are gemstones removed from jewelry.
Natural Diamond, 0.20 ct, Approx. 3.7 mm, Jewelry Remover d0016
Natural Diamond, 0.20 ct, Approx. 3.7 mm, Jewelry Remover d0016. the stone type, whether natural or synthetic, has not been verified by a third-party appraisal agency. These are gemstones removed from jewelry.
Lot of 81 Round brilliant cut diamonds 3.73cttw G-H-I SI2-I1 0.045 SIZE RANGE
ROUND BRILLIANT CUT DIAMONDS. GENUINE AUTHENTIC ROUND BRILLIANT CUT. NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. THIS LOT IS FROM MANUFACTURERS' PRODUCTION INVENTORY.
0.65ct OLD TRANSITIONAL CUT DIAMOND L I1 LOOSE NATURAL VINTAGE ESTATE EUROPEAN
0.65 ct transitional cut diamond round clearty I3-L not enhanced natural stone.thanks.stone open cavity in center of stone please look at photos and ask Questions
lab grown diamond loose
The product is a lab-grown diamond loose, meaning it is a diamond that has been created through a man-made process rather than being mined from the earth. Lab-grown diamonds are chemically identical to naturally occurring diamonds and are increasingly being used in jewelry as an ethical and sustainable alternative. The loose diamond can be set into a variety of jewelry pieces such as rings, earrings, or necklaces, making it a versatile and valuable gemstone for both jewelry creators and consumers.
Rough Facet Silver Gem uncut .75ct raw Canada
Gem Rough Facet Silver White Diamond uncut. 75ct raw. Canada origin.
1.00 CT Natural Antique Cut Oval Diamond E/F SI1 *NOT LAB*
Color Grade VERY WHITE BRIGHT AND FULL OF LIFE. Clarity Grade.
0.52ctw Round Brilliant Natural Diamond Fancy Intense Gray Yellow F SI2 GWLAB
0.52ctw Round Brilliant Natural Diamond Fancy Intense Gray Yellow F SI2 GWLAB
.85 ct Carat GIA E / SI2 Old European Cut Loose Natural Diamond C5202
Clarity : SI2. (although GIA Dossier identifies stone as a round brilliant cut). GIA Certified GIA Certification Date : July 9, 2026. GIA Report :245003179. Girdle : Thin - Very Thick (faceted) 6.5%.
GIA Certified Old European Brilliant .41 Carat SI1 D Natural Genuine Diamond
CLARITY: SI1. CERTIFICATE: GIA. CARAT WEIGHT.41. EARTH MINED DIAMOND. G.I.A. CERTIFIED.
3.04 Carat lab grown diamond E SI 1
3.04 Carat lab grown diamond E SI 1.
GIA Certified Round .50 Carat VS1 F Loose Natural Earth Mined Diamond
CUT: NATURAL ROUND BRILLIANT • WEIGHT.50 CT • CLARITY: VS1 • COLOR: F. EARTH MINED DIAMOND. G.I.A. CERTIFIED.
Lot of 210+ Round brilliant cut diamonds 5.23cttw G-H-I SI1-SI2 .015-.025 range
ROUND BRILLIANT CUT DIAMONDS. GENUINE AUTHENTIC ROUND BRILLIANT CUT. NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. THIS LOT IS FROM MANUFACTURERS' PRODUCTION INVENTORY.
GIA Certified Old European Brilliant .50 Carat VS2 H Natural Genuine Diamond
EARTH MINED DIAMOND. G.I.A. CERTIFIED.
GIA Certified Natural 4.25 Ct Oval Pink Tourmaline Loose Gem Stone
OVAL • WEIGHT: 4.25 CT • COLOR: PINK • Modified Brilliant Cut. ACTUAL STONE PICTURED. G.I.A. CERTIFIED.
You save $25.00
GIA Certified Old Mine Brilliant .49 CT I1 Loose Mined Natural Diamond
Natural Old Mine Brilliant • Weight.49 CT • Clarity: I1 •. EARTH MINED DIAMOND. ACTUAL DIAMOND PICTURED! G.I.A. CERTIFIED.
You save $11.25
GIA Certified 1.01 Carat Natural Octagonal Cut Green Emerald Loose Gem Stone
ACTUAL STONE PICTURED. CUSHION CUT • WEIGHT: 1.01 CT • COLOR: GREEN. G.I.A. CERTIFIED.
You save $20.00
Lot of 18 Loose Diamonds - All Removed From 10k 14k 18k Scrap Gold Jewelry
All stones have been removed from scrap gold (estate) jewelry - 10k / 14k 18k solid gold. I did my best to not damage any of the diamonds and have tried to remove any that were previously chipped. I am not an expert in diamonds but all tested as diamond before being removed from the gold jewelry. Total weight of all the diamonds is approximately .52g or 2.6 carats. Lot includes various sizes / colors (see photos).
GIA Certified Round .52 Carat VS2 E Loose Natural Earth Mined Diamond
CUT: NATURAL ROUND BRILLIANT • WEIGHT.52 CT • CLARITY: VS2 • COLOR: E. EARTH MINED DIAMOND. G.I.A. CERTIFIED.
You save $28.75
6 clean, white marquise cut Diamonds (nat., earth mined) 0.40tcw
The 6 pictured are what I ship. All are natural, earth mined diamond. Total diamond weight is 0.40 carat. I used vintage, German balance with aluminum weights. If under or over 0.40 it will be by no more than 0.01ct. All 6 are white showing no color. Using 10x 5 show no carbon and no inclusions that I could see. 1 has 2 very tiny carbon specks. I'll give a full refund if any part of description isn't accurate. I'll securely ship but I don't have diamond paper.
ESTATE SIMPLE USE GEM ELECTRONIC DIAMOND MASTER TESTING UNIT EX COND FREE SHIP!
Simple to use; just plug in power, turn on unit and touch the stone with the wand tip. Natural diamonds test green. Synthetics test red. Unit includes the electronic testing device, 110V power adapter, testing wand, soft travel case, hard storage box and diamond tweezers.
0.83 CT Loose Natural Tolkowsky Diamond - Ideal Cut - I SI2 - 100% Eye Clean!
Up for sale is a stunning, loose 0.83-carat natural diamond from the world-renowned Tolkowsky collection. This stone features Marcel Tolkowsky’s legendary "Ideal Cut" proportions, engineered using strict physics to maximize light performance, fire, and brilliance.
Natural 0.26ct Old European Cut Loose Diamond Lot of 7
Total Carat Weight: 0.26ct. Color: F-G.
.87 ct Carat Round Brilliant Cut GIA Dossier D / VS2 Loose Natural Diamond C5201
GIA Dossier Certified. 87 ct Carat Round Brilliant Cut Loose Natural Diamond. Clarity : VS2. GIA Certification Date : July 7, 2026. Polish : Very Good. Cut : Good. Total Depth : 61.2%.
Lot of 8 Loose Diamonds (Removed From 10k 14k 18k Scrap Gold Jewelry) 0.5 TCW
All stones have been removed from scrap gold (estate) jewelry - 10k / 14k 18k solid gold. I did my best to not damage any of the diamonds and have tried to remove any that were previously chipped. Each diamond is around 0.05ct each (though they average 0.06ct and vary in size / color). Total weight of all diamonds is approximately 0.1g (0.5ct).
Natural Diamond Marquise VSI - SI
This product is a natural marquise cut diamond with an excellent cut grade and SI - VSI clarity grade. The diamond is colorless with an intensity of fancy vivid, making it a beautiful and valuable gem for jewelry-making purposes.
GIA Certified Natural 1.57 Ct Octagonal Pink Pyrope-Almandine Garnet Gem Stone
Pyrope-Almandine Garnet. G.I.A. CERTIFIED.
Melange lot of 470+ Round brilliant cut diamonds 10.82cttw GHI SI2-SI3 EYE CLEAN
ROUND BRILLIANT CUT DIAMONDS. GENUINE AUTHENTIC ROUND BRILLIANT CUT. NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. THIS LOT IS FROM MANUFACTURERS' PRODUCTION INVENTORY.
GIA Certified 0.11ct Fancy Brownish Orangy Pink Cushion Natural Diamond
Fancy Color: Fancy brownish orangy pink. Certifying Lab: GIA. Stone Shape: Cushion. Diamond Weight: 0.11ctw. Polish: Good.