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Three Gemstones: Tanzanite, Sapphire, Ruby: 2.49 carat deep blue oval sapphire, heated, Africa. 0.64 carat pear shaped blue violet tanzanite, treatment: natural, Tanzania. 1.32 carat round red ruby, treatment: none, Madagascar. The heat treatme

6 days Left

Three Gemstones: Tanzanite, Sapphire, Ruby

Cordier Auctions

Quartz Cluster: Cluster of clear quartz crystals. H 8 in. L 16 in.

Apr 16, 2026

New England Auctions - Fred Giampietro

Peridot in Basalt Specimen: Peridot in Basalt Specimen. 7 in. x 9 in. x 6-1/2 in.

Apr 16, 2026

Peridot in Basalt Specimen

New England Auctions - Fred Giampietro

California Benitoite 8.4ct Pear Cut Certified: Museum-quality find. Originating only from California's San Benito River Valley, this barium titanium silicate features intense blue color and higher fire than diamond. A certified stone would highlig

Apr 13, 2026

California Benitoite 8.4ct Pear Cut Certified

California Gemstones

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES: 17.5" TALL X 7" WIDE 20.10 KILOGRAMS

Apr 21, 2026

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES

J. Greenstein & Co., Inc.

AMETHYST GEODE WITH POLISHED EDGES CATHEDRAL: Excellent color. Polished edge. 9.5" tall and 8.5 kilograms.

Apr 21, 2026

AMETHYST GEODE WITH POLISHED EDGES CATHEDRAL

J. Greenstein & Co., Inc.

Five Tourmaline Gemstones: 4.21 carat baguette cut rose pink tourmaline, Nigeria. 5.63 carat rectangular cut blue green tourmaline, Nigeria. 7.41 carat hot pink terminated crystal tourmaline, Minas, Brazil. 8.62 carat emerald c

6 days Left

Five Tourmaline Gemstones

Cordier Auctions

Apr 18, 2026

A beautiful watermelon two-color glue-free tourmaline dragon brand

Admirable Collections

A crystal-encased scepter of Liao Jin: Liao Jin's crystal-encapsulated scepter Size:L:53cmW:7.7cmW:960g (The Dimensions Of All Batches Are Manually Measured.If You Need More Detailed Information, Please Contact Our Customer Service Before

Apr 18, 2026

A crystal-encased scepter of Liao Jin

Admirable Collections

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.

AMETHYST GEODE. INCREDIBLE COLOR, POLISHED EDGES: Excellent colors. 12 kilo and 12" tall.

Apr 21, 2026

AMETHYST GEODE. INCREDIBLE COLOR, POLISHED EDGES

J. Greenstein & Co., Inc.

A POLISHED BULLSEYE MALACHITE SPECIMEN: A POLISHED BULLSEYE MALACHITE SPECIMEN.

Apr 21, 2026

A POLISHED BULLSEYE MALACHITE SPECIMEN

J. Greenstein & Co., Inc.

AN APOPHYLITE AND SCOLECITE SPECIMEN INDIA: 14" x 4" in size. Magnficent in structure

Apr 21, 2026

AN APOPHYLITE AND SCOLECITE SPECIMEN INDIA

J. Greenstein & Co., Inc.

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES: 15.5" TALL AND 9.5" AT IT'S WIDEST, 24.6 KILOGRAMS

Apr 21, 2026

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES

J. Greenstein & Co., Inc.

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES: 17" tall X 8" at its widest. It weighs 19.5 KILOGRAMS

Apr 21, 2026

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES

J. Greenstein & Co., Inc.

Crystals: Quartz Points, Geode, Pyrite & Stilbite: India & North America, ca. million of years ago. A mixed group of mineral specimens including quartz points, a cut geode, smoky quartz, pyrite, stilbite, pale amethyst, and green apophyllite with stil

2026

Crystals: Quartz Points, Geode, Pyrite & Stilbite

Artemis Fine Arts

A Possible Meteorite: A Possible Meteorite. Unverified. Dimension: 19" x 7.5" x 7.5".

23 hrs Left

A Possible Meteorite

Jumbo Auction House

A Possible Meteorite: A Possible Meteorite. Unverified. Dimension: 15.5" x 10.5" x 5".

23 hrs Left

A Possible Meteorite

Jumbo Auction House

A Possible Meteorite: A Possible Meteorite. Unverified. Dimension: 17" x 12.5" x 7.5".

23 hrs Left

A Possible Meteorite

Jumbo Auction House

A Possible Meteorite: A Possible Meteorite. Unverified. Dimension: 13" x 10" x 7.5".

23 hrs Left

A Possible Meteorite

Jumbo Auction House

A RARE SCOLECITE SPECIMEN FORMATION: Rare and delicate scolecite specimen from the Deccan Basalts, Aurangabad, Maharashtra, India 9" wide.

Apr 21, 2026

A RARE SCOLECITE SPECIMEN FORMATION

J. Greenstein & Co., Inc.

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES 46 kilo!!!!: 25" TALL, 17" AT IT'S WIDEST 46.45 KILOGRAMS

Apr 21, 2026

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES 46 kilo!!!!

J. Greenstein & Co., Inc.

A MAGNIFICENT CITRINE CLUSTER ON A STAND: This cluster includes large and small crystals. The stone itself is 20" tall and 32" on the stand.

Apr 21, 2026

A MAGNIFICENT CITRINE CLUSTER ON A STAND

J. Greenstein & Co., Inc.

Tektite ritual implements are handcrafted, hammered, chiseled, and inlaid with gemstones.: This is a hand-hammered, chiseled, and gem-inlaid ritual implement made of meteorite iron. It is 67 cm high, 30 cm wide, and weighs approximately 6100 g. Provenance:Private collection from a professor

2 days Left

Tektite ritual implements are handcrafted, hammered, chiseled, and inlaid with gemstones.

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