Loose Diamonds
loose diamonds — pre-owned
Browse 3,665 loose diamonds — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.
I.G.I. Certified Lab Diamond 2.1 Carats Modified Brilliant Cut
Magnificent Cut Corner Rectangular Modified Brilliant Cut. Lab Diamond. Fancy Vivid Pink.
.50 Carat Natural "White" Princess Cut Diamond | Loose Gemstone
Message me for more photos and details
1/4 TCW Vintage Salvaged Diamond Loose Stone for Mounting
The product is a 1/4 carat total weight (TCW) vintage salvaged diamond loose stone for mounting. This round cut diamond is natural and not enhanced, making it a unique and timeless piece for jewelry. With a width of 4.1mm, this gemstone is perfect for adding a vintage touch to any mounting or setting. This one-piece diamond is a beautiful addition to any jewelry collection, especially for those who appreciate vintage and unique pieces.
Rose cut Natural Diamonds 5 Marquise & 3 Trillions F-G VVS-VS HIGH QUALITY
GENUINE AUTHENTIC MARQUISE AND TRILLION. ROSE CUT DIAMONDS. NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. GRADING IS OUR OWN EXPERT OPINION.
2.02 Carat Lab Grown Diamond
2.02 Carat Lab Grown Diamond. Condition is Pre-owned. Shipped with USPS Ground Advantage.
Natural Round Cut Diamond Loose Gemstone, Transparent, Round Shape, 1 Piece
Natural Round Cut Diamond Loose Gemstone, Transparent, Round Shape, 1 Piece
This pendant is stamped 14K on the bail and has been tested as solid 14K yellow
This pendant is stamped 14K on the bail and has been tested as solid 14K yellow
GIA RBC Loose Natural Diamond~Gorgeous Sparkler! Mined&Untreated! Read me
GIA has three in-house GIA gemologists grade each stone independently, and then they use the average of the three for the final report. Buying a quality, loose GIA diamond let's you choose your (or their) favorite setting to mount it in!
Natural MUZO Colombian Green Emerald Genuine Not Lab Created !
Natural MUZO Colombian Green Emerald Genuine Not Lab Created !
Natural Diamond Loose Certified AGI 3.18 Carat Color L Clarity VS2
Polish - very good Fluorescent- none Round Girdle- thin to med
Loose Diamond New and Appraisal.Please Read Description
Loose Diamond never worn by anyone. it has been kept clean in storage and never worn. The diamond is in a setting just for presentation and that’s the way it will come to you.1.30 CT,H Color and VS2 Clarity.Have receipt and Appraisal.
2.04 GIA Old Mine Cut Natural Diamond W-X VS2
Graded VS2 clarity by GIA, the diamond is eye-clean and full of life from every angle. With chunky faceting, a large culet, and a beautifully pillowy outline, this diamond embodies everything collectors and antique diamond lovers cherish about old-cut stones.
LOT OF 42 ROUND BRILLIANT CUT Diamonds 3.21cttw GH SI1-SI2 0.07ct AVERAGE SIZE
ROUND BRILLIANT CUT DIAMONDS. GENUINE AUTHENTIC ROUND BRILLIANT. CUT NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. PRICED WAY BELOW MARKET WHOLESALE VALUES!
1.00ct Natural loose Diamond certified
This product is a 1.00ct round polished natural loose diamond certified for gem use. It is a single piece with a total carat weight between 1.00 ctw - 1.24 ctw. The diamond is not enhanced and is suitable for jewellery making or investment purposes. It is not vintage and is not sold in wholesale quantities. This high-quality loose diamond would make a valuable addition to any jewellery collection.
5 Carat Round Brilliant Cut Loose Opaque Black Diamond
Weight - 0.96g.
lab grown diamond princess cut 1.05
The product is a lab grown diamond princess cut with a total carat weight of 1.05. It is cut to excellent quality and has a transparent appearance. The diamond is certified by IGI and has a very slightly included clarity grade, with a very light colored diamond intensity and a color grade of G. It is sourced from India and can be purchased at wholesale prices. This diamond is ideal for jewelry and watchmaking, offering a high-quality gemstone for various designs and creations.
GIA Certified ASSCHER CUT .40 CT SI1 Natural FANCY Yellow Diamond
EARTH MINED DIAMOND. G.I.A. CERTIFIED.
GIA Certified Old Circular Brilliant .72 Carat I3 H Loose Mined Natural Diamond
OLDER CIRCULAR BRILLIANT • WEIGHT.72 CT • CLARITY: I3 • COLOR: H. EARTH MINED DIAMOND. ACTUAL DIAMOND PICTURED! G.I.A. CERTIFIED.
Melange Lot of 30 Princess cut diamonds 3.30cttw GHI-J SI2-I1 0.05 to 0.15 sizes
PRINCESS CUT DIAMONDS. GENUINE AUTHENTIC PRINCESS CUT. NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. THIS LOT IS FROM MANUFACTURERS' PRODUCTION INVENTORY.
Lot of 920+ Round brilliant cut diamonds 11.01cttw G-H-I SI1-SI2, 1mm to 1.6mm
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 .38 Carat Natural Cushion Cut Green Emerald Loose Gem Stone
CUSHION CUT • WEIGHT.38 CT • COLOR: GREEN. ACTUAL STONE PICTURED. G.I.A. CERTIFIED.
1.04 ct Carat Pear Brilliant Loose GIA D / SI1 Natural Diamond C5119
1.04 ct Carat Pear Brilliant Cut Loose Natural Diamond. Clarity : SI1. GIA Certified GIA Certification Date : May 12, 2026. Laser Inscribed : GIA 5231952411. GIA Report : 5231952411. You WILL receive the item that is photographed.
Exotic Estate 1.19ct Natural Orange DIAMOND - Induced Color
This is a natural diamond that I pulled out of an estate necklace. The stone weighs 1.19ct and is eye clean. The stone is a vibrant orange which is assuredly and induced color by HPHT processing.
LOT OF 25 ROUND BRILLIANT CUT Diamonds 2.76cttw JKL SI1-SI2 1/5ct to 1/3ct sizes
ROUND BRILLIANT CUT DIAMONDS. GENUINE AUTHENTIC ROUND BRILLIANT. CUT NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. PRICED WAY BELOW MARKET WHOLESALE VALUES!
1.31 ct Carat Round Brilliant Cut Loose GIA O-P / I2 Natural Diamond B9864
Clarity : I2. 1.31 ct Carat Round Brilliant Cut Loose Natural Diamond. Presents better than the I2 clarity designation suggests! GIA Certified GIA Certification Date : October 9, 2025. Laser Inscribed : GIA 6237740567.
Jewelry Loose Diamond Natural Diamond 0.42ct 2329545
Total Main Stone(s) : Natural Diamond. Rectangular cut. Main Color : Nothing. We have: A wide range of pre-owned bags. and a professional appraisal.
Melange Lot of 110 Princess cut diamonds 4.60cttw GHI SI1SI3 0.03 to 0.05+ sizes
PRINCESS CUT DIAMONDS. GENUINE AUTHENTIC PRINCESS CUT. NATURAL DIAMONDS. WE HAVE BEEN IN THE DIAMOND AND GEMSTONE JEWELRY INDUSTRY. EARTH MINED. THIS LOT IS FROM MANUFACTURERS' PRODUCTION INVENTORY.
.61 ct Carat Round Brilliant Cut GIA Dossier G/VS2 Loose Natural Diamond C5096
GIA Dossier Certified GIA Dossier :1232944642.61 Carat Round Brilliant Cut Loose Natural Diamond. Clarity : VS2. Laser inscribed : GIA 1232944642. GIA Certification Date : May 4, 2026. Polish : Good.
Natural Diamond Loose Marquise .75 CTTW Solid Gem Lot
This product is a set of four marquise-cut natural diamonds with a total carat weight of .75 CTTW. The diamonds are of excellent cut grade, SI - VSI clarity grade, and D-J color grade. They are being sold as a wholesale lot and are ideal for jewelry making or investment purposes. These diamonds are genuine gemstones created through natural means and come in various lengths, depths, and widths.
2.15 Carat I3 Round Brilliant Natural MINED Diamond 8.29mm X 4.91mm
2.15 carat diametion in mm it's I3
Melange Lot of 42 Marquise CUT Diamonds 4.23cttw H-J SI3-I1 0.04 TO 0.28ct sizes
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.
.16 tcw Tapered Baguette Match Pair Natural Diamonds Loose VS
You are bidding on a pair of natural diamonds in a tapered baguette shape, with a total carat weight of 0.16 carats. The diamonds are graded as Very Slightly Included (VS2) in terms of clarity, and have a color grade of G. This pair of loose diamonds would be ideal for use in jewelry making or as an addition to an existing diamond collection. First I want to say I don't know a lot about diamonds. I have measured the diamonds with the only gauge I have. Items in this auction are sold in as is as found condition. Please look at all the pictures and if you have any questions please ask. Please look at all my other auctions.
GIA Certified Round Brilliant .74 Carat SI1 Loose Natural Earth Mined Diamond
CUT: NATURAL ROUND BRILLIANT • WEIGHT.74 CT • CLARITY: SI1 • COLOR: K, FT. BR. EARTH MINED DIAMOND. G.I.A. CERTIFIED.
GIA Certified Round .57 Carat VVS2 F Loose Natural Earth Mined Diamond
CUT: NATURAL ROUND BRILLIANT • WEIGHT.57 CT • CLARITY: VVS2 • COLOR: F. EARTH MINED DIAMOND. G.I.A. CERTIFIED.
0.55 ctw trillion cut loose diamonds natural triangle H-I VS2 5mm 1/4 estate
These natural diamonds are transparent, not enhanced, and have a color grade of H-I with a clarity grade of VS2. The triangles are a great match.
GIA CERTIFIED Genuine Round Brilliant .31 CT I1 H Natural Earth Mined Diamond
NATURAL EARTH MINED ROUND CUT. 31 CT • CLARITY: I1 • COLOR: H. GIA CERTIFIED DIAMOND. ACTUAL STONE IS PICTURED!
Natural Marquise Diamond Lot D to J Color SI-1 to I1 Excellent Cut White .57 CTW
DIAMOND LOT: 0.57 CTW NATURAL MARQUISE DIAMONDS. Beautiful, NATURAL, NOT ENHANCED, DIAMONDS perfect for repairs, jewelry making or collecting. These natural diamonds are up to. 08 ct in size, near colorless (D to J) and very good clarity (I-1 to SI-1).
GIA CERTIFIED Round Brilliant .43 CT SI2 I Natural Earth Mined Diamond
NATURAL EARTH MINED ROUND CUT. 43 CT • CLARITY: SI2 • COLOR: I. GIA CERTIFIED DIAMOND. ACTUAL STONE IS PICTURED!
17th Century Old Mine Cut White Diamond | Offset Girdle | Open Cutlet | 1.25ct
Girdle is wide on one side - thin on the other - such are the old legendary handcuts of the era. I touch them too much and fiddle with them way more than I should.
1.06 Ct Pear Cut IGI Certified Lab Grown CVD Diamond E Color VS1 Clarity STONE
The product is a 1.06 carat pear cut IGI certified lab grown CVD diamond with E color and VS1 clarity. This diamond is transparent, with excellent cut grade and is created in a lab. It comes with certification from IGI.