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Mixed Mineral & Geode Specimens 12pc COLLECTION: Mixed lot of twelve mineral specimens including agate geode halves, polished stone specimens, and amethyst crystal clusters. The group features banded agate, druzy quartz interiors, and natural minera

4 days Left

Mixed Mineral & Geode Specimens 12pc COLLECTION

MiddleManBrokers Inc.

(5 bids)

Triton Trumpet Conch Shell Specimen: Natural Triton trumpet conch shell specimen. Measures approx. 10 x 5.5 x 4.5 inches. Some small chips and scratching. Tritons trumpet, conch Shell. Shell specimen, collectibles, home decor, home acces

3 days Left

Triton Trumpet Conch Shell Specimen

The Benefit Shop Foundation Inc.

(5 bids)

Featured

Burmese Ruby 10.9ct Round Cut No Reserve EGL Certified: High-carat, investment-level piece! Originating from the Mong Hsu region in Myanmar. Slightly included "loupe clean". Vivid red , known for high saturation and natural fluorescence.This is a showstopp

1 day Left

Burmese Ruby 10.9ct Round Cut No Reserve EGL Certified

California Gemstones

(5 bids)

Incredible Quartz Jersey Bluff Discoidal, Greene Co. Arkansas. Ex Jack Roberts. Motley & jackson: Incredible Quartz Jersey Bluff Discoidal, Greene Co. Arkansas. Ex Jack Roberts. Motley & jackson COA's. Outstanding piece of Pink Quarzt, Nicely Cupped on both sides and Highly Polished. Ex jack Rober

7 days Left

Incredible Quartz Jersey Bluff Discoidal, Greene Co. Arkansas. Ex Jack Roberts. Motley & jackson

Heartland Artifact Auctions

(2 bids)

Monumental More Than 2 Foot Long Tridacna Gigas Giant Half Clamshell: Monumental More Than 2 Foot Long Tridacna Gigas Giant Half Clamshell. Size: 25 1/2 x 15 1/2 x 7 1/2 In. Tridacna is a genus of large saltwater clams, marine bivalve molluscs in the subfamily Tridacni

7 days Left

Monumental More Than 2 Foot Long Tridacna Gigas Giant Half Clamshell

Sarasota Estate Auction

(2 bids)

Petrified Sequoia Tree Trunk, Polished Cross-section: North America, western United States, Eocene to Pleistocene Epoch, ca. 55 million to 11,700 years ago. A substantial section of petrified Sequoia tree trunk, cross-cut and polished on one end to revea

2026

Petrified Sequoia Tree Trunk, Polished Cross-section

Artemis Fine Arts

WITHLACOOCHEE BOTRYOIDAL Agatized Coral Druzy with Druzy Quartz Crystals: Beautiful WITHLACOOCHEE BOTRYOIDAL Agatized Coral Druzy with Druzy Quartz Crystals. It measures 10" Long x 6" Wide x 2.5" Thick and Weighs 3 lbs 7 oz. This fossilized coral is named after the Withlaco

WITHLACOOCHEE BOTRYOIDAL Agatized Coral Druzy with Druzy Quartz Crystals

Western Sportsman LLC

(18 bids)

Natural Botryoidal Malachite Mineral Specimen: Natural malachite botryoidal specimen with rich green tones, glossy luster, and visible banding. Retains natural matrix to the reverse.Dimensions: 8.5 X 14 X 7.5 in. Condition: Good overall condit

4 days Left

Natural Botryoidal Malachite Mineral Specimen

MiddleManBrokers Inc.

(6 bids)

Big AMETHYST Geode Cathedral, Weight: 27 lbs: Stunning AMETHYST Geode Cathedral. It measures 18.75" Tall x 8" Wide x 7" Depth and the Total Weight is 27 lbs 15 oz. This Amethyst Geode Cathedral was mined in Brazil and has vibrant colors and nice

Apr 23, 2026

Big AMETHYST Geode Cathedral, Weight: 27 lbs

Western Sportsman LLC

(6 bids)

Natural Sea Shell and Coral Specimens 3pc LOT: Lot of three natural marine specimens including a large spiral sea shell, barnacle cluster, and white branching coral piece. The lot displays natural textures and coloration typical of ocean collected

4 days Left

Natural Sea Shell and Coral Specimens 3pc LOT

MiddleManBrokers Inc.

(4 bids)

Malachite and Chrysocolla Boulder: Malachite and Chrysocolla boulder. 10 in. x 7 in. x 2-3/8 in.

4 days Left

Malachite and Chrysocolla Boulder

New England Auctions - Fred Giampietro

(2 bids)

Large Agate Specimen: Large Agate Specimen, most of the irregular surface now polished. {Approximate dimensions: 21 1/2" H. x 13" W. x 10 1/2" D.}.

5 days Left

Large Agate Specimen

Michaan's Auctions

(2 bids)

Rock Collection: Largest is approx 5/8" x 3 1/2" x 4". Shipping available

Apr 19, 2026

Rock Collection

M.J. Stasak Jr. Auction and Appraisal Service

(1 bid)

Natural Emerald 379 Ct: Emerald shape Multi-faceted. Gemological Laboratory

6 days Left

Natural Emerald 379 Ct

Mid-Hudson Auction Galleries

(1 bid)

ENZO MARI (Novara 1932 - Milano 2020) for DANESE Cube Paperweight: Measures 2.25" H x 2.75" W x 2.75" D. "EM inscribed on cube" Aluminum. Danese Italy, c. 1960.

Apr 26, 2026

ENZO MARI (Novara 1932 - Milano 2020) for DANESE Cube Paperweight

(1 bid)

2.24 Ct Natural Zambian Green Emerald Octagon Cut: Weight - 2.24 Ct / Dimensions - 8.20 x 6.60 x 5.70 mm / Shape - Octagon Cut / Color - Green / Clarity - SI / Origin - Zambia / Comments - Natural Emeralds are commonly enhanced by oil

1 day Left

2.24 Ct Natural Zambian Green Emerald Octagon Cut

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES: 21.5" TALL AND 8" AT IT'S WIDEST, 21.5 KILOGRAMS

Apr 21, 2026

AMETHYST CATHEDRAL GEODE WITH POLISHED EDGES

J. Greenstein & Co., Inc.

Beautifully Mounted Vibrant Amethyst Specimen.: Vibrant purple amethyst specimen beautifully mounted in a black iron? stand. Dimensions: 13" w x 11.5" h.

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Beautifully Mounted Vibrant Amethyst Specimen.

Clarke Auction Gallery

Petrified Wood Log Specimen, Weight: 9 lbs: Awesome Petrified Wood Log Specimen. It has a beautiful section on the side that is colorful and smooth. It measures 10.5" Tall x 7.5" Wide x 3.25" Thick and the Total Weight is 9.35 lbs. Petrified wo

Petrified Wood Log Specimen, Weight: 9 lbs

Western Sportsman LLC

(7 bids)

Approximately 4 ct natural emerald gemstone: Approximately 4 ct natural emerald gemstone. Please see photos. Beautiful colors. In very good original as found condition. Great quality and detail. For in house shipping, please call Mike at Thrifti

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Approximately 4 ct natural emerald gemstone

Thriftiques of Iowa

(5 bids)

AMETHYST Geode Cathedral, Weight: 31 lbs: Incredible AMETHYST Geode Cathedral. It measures 11.75" Tall x 10.5" Wide x 7 7/8" Depth and the Total Weight is 31 lbs 15 oz. This Amethyst Geode Cathedral was mined in Brazil and is a truly imp

Apr 23, 2026

AMETHYST Geode Cathedral, Weight: 31 lbs

Western Sportsman LLC

(5 bids)

XXL Polished BLUE LAPIS LAZULI Mineral Sphere, Weight: 18 lbs: XXL Formed and Polished BLUE LAPIS LAZULI Mineral Sphere. It measures 6 7/8" in Diameter and the Total Weight is 18 lbs 10 oz. Lapis Lazuli is a deep blue metamorphic rock used as a semi-pre

Apr 23, 2026

XXL Polished BLUE LAPIS LAZULI Mineral Sphere, Weight: 18 lbs

Western Sportsman LLC

(5 bids)

Exceptional Jersey Bluff Discoidal, Madison Co. Illinois. Motley COA. Oustanding porphyry granite: Exceptional Jersey Bluff Discoidal, Madison Co. Illinois. Motley COA. Oustanding porphyry granite material with amazing polish. Ex George Hoke, Floyd Ritter, Brandon Vanderver. Absolutely amazing coll

7 days Left

Exceptional Jersey Bluff Discoidal, Madison Co. Illinois. Motley COA. Oustanding porphyry granite

Heartland Artifact Auctions

(3 bids)

XL Natural Arkansas CLEAR QUARTZ CRYSTAL Specimen, Weight: 17 lbs: XL Natural Arkansas CLEAR QUARTZ CRYSTAL Specimen. It measures 12.5" Long x 8.5" Wide x 5.5" Tall and the Total Weight is 17 lbs 8 oz. Arkansas quartz crystal is world-renowned for its exceptional cla

Apr 23, 2026

XL Natural Arkansas CLEAR QUARTZ CRYSTAL Specimen, Weight: 17 lbs

Western Sportsman LLC

(2 bids)

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