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IGI Princess 1.05ct E VVS2 Loose Lab Diamond: IGI Princess 1.05ct E VVS2 Loose Lab Diamond A rare and exceptional lab-grown diamond, the IGI Princess boasts an impressive 1.05ct of flawless brilliance, boasting an E color grade for maximum light

2026

IGI Princess 1.05ct E VVS2 Loose Lab Diamond

Loose Lab Diamond - IGI Emerald 1.06ct Fancy Vivid Pink VVS2: Loose Lab Diamond - IGI Emerald 1.06ct Fancy Vivid Pink VVS2 Experience the rare beauty of a lab-grown diamond, certified by the International Gemological Institute (IGI) as a Fancy Vivid Pink gemston

6 days Left

Loose Lab Diamond - IGI Emerald 1.06ct Fancy Vivid Pink VVS2

Est. $1,990-$2,985

Loose Lab Diamond - IGI Pear 1.02ct Fancy Vivid Blue VVS2: Loose Lab Diamond - IGI Pear 1.02ct Fancy Vivid Blue VVS2 Experience the rare beauty of a lab-grown Fancy Vivid Blue diamond, certified by IGI as VVS2 clarity and boasting EX polish and symmetry. This

4 days Left

Loose Lab Diamond - IGI Pear 1.02ct Fancy Vivid Blue VVS2

Est. $2,320-$3,480

Loose Lab Diamond - IGI Emerald 0.91ct Fancy Vivid Green VVS2: Loose Lab Diamond - IGI Emerald 0.91ct Fancy Vivid Green VVS2 Experience the rare beauty of a lab-grown emerald, certified by IGI as Fancy Vivid Green with exceptional clarity and polish. This 0.91ct

5 days Left

Loose Lab Diamond - IGI Emerald 0.91ct Fancy Vivid Green VVS2

Est. $1,600-$2,400

A RARE SCOLECITE FORMATION SPECIMEN: Rare and delicate scolecite specimen from the Deccan Basalts, Aurangabad, Maharashtra, India. 6" wide.

Apr 21, 2026

A RARE SCOLECITE FORMATION SPECIMEN

J. Greenstein & Co., Inc.

Est. $200-$300

IGI Round 1.5ct D VVS2 Ideal Loose Lab Diamond: IGI Round 1.5ct D VVS2 Ideal Loose Lab Diamond A rare opportunity to own a genuine lab-grown diamond, certified by the International Gemological Institute (IGI) as a D color, VVS2 clarity, and EX poli

2026

IGI Round 1.5ct D VVS2 Ideal Loose Lab Diamond

IGI Round 1.35ct E VVS2 Ideal Loose Lab Diamond: IGI Round 1.35ct E VVS2 Ideal Loose Lab Diamond A rare opportunity to own a lab-grown diamond of exceptional quality, this 1.35ct IGI Round E VVS2 Ideal loose diamond boasts an EX polish and symmetry,

2026

IGI Round 1.35ct E VVS2 Ideal Loose Lab Diamond

IGI Round 0.52ct Fancy Vivid Pink VVS1 Loose Lab Diamond: IGI Round 0.52ct Fancy Vivid Pink VVS1 Loose Lab Diamond A rare and breathtakingly beautiful lab-grown diamond, this 0.52ct Fancy Vivid Pink VVS1 gemstone shines with exceptional clarity and color, ma

5 days Left

IGI Round 0.52ct Fancy Vivid Pink VVS1 Loose Lab Diamond

Est. $1,975-$2,965

IGI Round 1.1ct E VVS2 Loose Lab Diamond: IGI Round 1.1ct E VVS2 Loose Lab Diamond A rare opportunity to own a genuine lab-grown diamond, certified by the International Gemological Institute (IGI), this 1.1ct E VVS2 loose gemstone boasts exce

4 days Left

IGI Round 1.1ct E VVS2 Loose Lab Diamond

Est. $1,660-$2,490

IGI Trapezoid 0.38ct E VVS2 Loose Lab Diamond: IGI Trapezoid 0.38ct E VVS2 Loose Lab Diamond A rare opportunity to own a genuine lab-grown diamond, certified by the International Gemological Institute (IGI), this 0.38ct E VVS2 loose gemstone boast

6 days Left

IGI Trapezoid 0.38ct E VVS2 Loose Lab Diamond

Est. $1,680-$2,520

Loose Lab Diamond - IGI Trapezoid 0.37ct E VVS2: Loose Lab Diamond - IGI Trapezoid 0.37ct E VVS2 A rare and exceptional lab-grown diamond, certified by the International Gemological Institute (IGI), boasts an impressive 0.37 carats of unparalleled b

6 days Left

Loose Lab Diamond - IGI Trapezoid 0.37ct E VVS2

Est. $1,645-$2,470

IGI Oval 1.01ct E VVS2 Loose Lab Diamond: IGI Oval 1.01ct E VVS2 Loose Lab Diamond A rare opportunity to own a truly unique gemstone, this 1.01ct IGI Oval lab diamond boasts exceptional clarity and color, with an EX polish and symmetry that s

22 hrs Left

IGI Oval 1.01ct E VVS2 Loose Lab Diamond

Est. $1,650-$2,475

Rare Fluorescent Barite, Cerussite and Galena Formation: Rare, large, highly fluorescent barite, cerussite and galena formation from Mibladden, Morocco. 9.75" x 10.5" x 3.5". 17 lbs, 6 oz.

Apr 26, 2026

Rare Fluorescent Barite, Cerussite and Galena Formation

Fossils & Gemstones of Houston

Est. $1,000-$1,200

Loose Lab Diamond - IGI Cushion Modified 0.56ct D VVS2: Loose Lab Diamond - IGI Cushion Modified 0.56ct D VVS2 A rare and exceptional lab-grown diamond, certified by the International Gemological Institute (IGI), boasts an impressive 0.56 carats of flawles

6 days Left

Loose Lab Diamond - IGI Cushion Modified 0.56ct D VVS2

Est. $1,315-$1,975

GIA Certified 0.29 ct. Grandidierite - MADAGASCAR: GIA Certified 0.29 ct. Grandidierite - MADAGASCAR Rare exceptional stone Color - Greenish Blue Clarity - VS Cut - Pear Modified Brilliant cut Ct. Weight - 0.29 ct.

3 days Left

GIA Certified 0.29 ct. Grandidierite - MADAGASCAR

Kissing Auction

Est. $1,000-$1,500

Calcite Stalactite Formation on Lucite Stand: Rare and unique calcite stalactite formation with different colored stalactites on custom lucite stand. 11" x 9" x 9". 17 pounds, 4 ounces.

Apr 26, 2026

Calcite Stalactite Formation on Lucite Stand

Fossils & Gemstones of Houston

Est. $2,000-$2,500

IGI Oval 1.0ct F IF Loose Lab Diamond: IGI Oval 1.0ct F IF Loose Lab Diamond Experience the beauty of a lab-grown diamond, certified by IGI as a flawless F color, IF clarity, and EX polish, making it a rare find for those seeking exception

5 days Left

IGI Oval 1.0ct F IF Loose Lab Diamond

Est. $2,830-$4,245

Rare Axinite Formation: Rare bladed axinite formation from Peru. 4.5" x 6.25" x 3.5". 2 pounds, 15 ounces.

Apr 26, 2026

Rare Axinite Formation

Fossils & Gemstones of Houston

Est. $500-$600

IGI Round 0.58ct Fancy Intense Pink VVS2 Ideal Loose Lab Diamond: IGI Round 0.58ct Fancy Intense Pink VVS2 Ideal Loose Lab Diamond Experience the rare beauty of a lab-grown Fancy Intense Pink diamond, certified by the International Gemological Institute (IGI) as VVS

5 days Left

IGI Round 0.58ct Fancy Intense Pink VVS2 Ideal Loose Lab Diamond

Est. $1,570-$2,355

Loose Lab Diamond - IGI Bullet 1.04ct D VVS2: Loose Lab Diamond - IGI Bullet 1.04ct D VVS2 A rare and exceptional lab-grown diamond, certified by the International Gemological Institute (IGI), boasts an impressive 1.04 carat in a stunning D color

6 days Left

Loose Lab Diamond - IGI Bullet 1.04ct D VVS2

Est. $2,215-$3,325

IGI Round 1.5ct D VVS2 Ideal Loose Lab Diamond: IGI Round 1.5ct D VVS2 Ideal Loose Lab Diamond A rare opportunity to own a stunning, lab-grown diamond with exceptional clarity and color. This 1.5ct IGI-certified D VVS2 Ideal Round brilliant feature

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IGI Round 1.5ct D VVS2 Ideal Loose Lab Diamond

Est. $2,540-$3,810

IGI Round 0.75ct D VVS2 Loose Lab Diamond: IGI Round 0.75ct D VVS2 Loose Lab Diamond A rare and exceptional lab-grown diamond, this 0.75ct IGI Round D VVS2 gemstone boasts an impressive cut, color, and clarity, making it a true standout in the

22 hrs Left

IGI Round 0.75ct D VVS2 Loose Lab Diamond

Est. $1,335-$2,005

IGI certified 0.10 ct. Rare Grandidierite - MADAGASCAR: IGI certified 0.10 ct. Rare Grandidierite - MADAGASCAR Rare Stone Weight - 0.10 ct. Color - Bluish Green Clarity - SI Cut -Round Mixed cut Dimensions - 3.09 - 2.96 x 1.75 mm <

3 days Left

IGI certified 0.10 ct. Rare Grandidierite - MADAGASCAR

Kissing Auction

Est. $600-$900

GIA Certified 0.17 ct. RARE Grandidierite - MADAGASCAR: GIA Certified 0.17 ct. RARE Grandidierite - MADAGASCAR Rare exceptional stone Cut - Triangular Modified Brilliant cut Color - Greenish Blue Clarity - VS Ct. Weight - 0.17 ct. Dim

3 days Left

GIA Certified 0.17 ct. RARE Grandidierite - MADAGASCAR

Kissing Auction

Est. $1,000-$1,500

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