Ac Gilbert Co Fossils

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38.36ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 23AY: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

38.36ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 23AY

ThousandPlanetSathorn, Bangkok

67.60ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 42AX: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

67.60ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 42AX

ThousandPlanetSathorn, Bangkok

37.67ct Natural Mariam Jasper (Calligraphy Stone) Cabochon Loose Gemstone, 16AK: This fully polished Mariam Jasper, widely referred to as Calligraphy Stone, features deep plum base matrix interlaced with intricate golden ochre fossilized mineral veining that creates natural brushs

2026

37.67ct Natural Mariam Jasper (Calligraphy Stone) Cabochon Loose Gemstone, 16AK

ThousandPlanetSathorn, Bangkok

320ct Natural Type A Burmese Jadeite Jade Polished Sliced Rough, 87AZ: This specimen is a sliced rough block of natural Type A Burmese jadeite jade. The interior displays natural colour zoning with visible mineral veining and crystalline patterns typical of unprocessed j

2026

320ct Natural Type A Burmese Jadeite Jade Polished Sliced Rough, 87AZ

ThousandPlanetSathorn, Bangkok

42.25ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 20AX: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

42.25ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 20AX

ThousandPlanetSathorn, Bangkok

35.60ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 87AX: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

35.60ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 87AX

ThousandPlanetSathorn, Bangkok

17.42 Carats Natural Ceylon Pale Taupe White Moonstone Cabochon Loose Gemstone, 90AB: This gentle pale taupe white moonstone displays a smooth silky body with soft diffused adularescent sheen across its surface, measured at 23.4x15.6x6.6mm, its muted neutral tone delivers quiet refined

2026

17.42 Carats Natural Ceylon Pale Taupe White Moonstone Cabochon Loose Gemstone, 90AB

ThousandPlanetSathorn, Bangkok

60.89ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 95AV: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

60.89ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 95AV

ThousandPlanetSathorn, Bangkok

32.97ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 7AX: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

32.97ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 7AX

ThousandPlanetSathorn, Bangkok

59.50ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 29AY: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

59.50ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 29AY

ThousandPlanetSathorn, Bangkok

20.21ct Natural Australian Queensland Matrix Boulder Opal Rounded Rectangle Cabochon, 73AV: Hand polished medium-sized rounded rectangular cabochon of natural Queensland matrix boulder opal, featuring rich speckled chocolate ironstone matrix decorated with distinctive layered orbicular golde

2026

20.21ct Natural Australian Queensland Matrix Boulder Opal Rounded Rectangle Cabochon, 73AV

ThousandPlanetSathorn, Bangkok

21.80ct Natural Mariam Jasper (Calligraphy Stone) Cabochon Loose Gemstone, 9AK: This fully polished Mariam Jasper, widely referred to as Calligraphy Stone, features deep plum base matrix interlaced with intricate golden ochre fossilized mineral veining that creates natural brushs

2026

21.80ct Natural Mariam Jasper (Calligraphy Stone) Cabochon Loose Gemstone, 9AK

ThousandPlanetSathorn, Bangkok

19.17 Carats Natural Ceylon Soft Milky White Moonstone Loose Gemstone, 70FE: This natural Ceylon moonstone carries a smooth milky white base with subtle gentle adularescent glow across its polished surface, measured at 19.2x14.9x9.2mm, showcasing clean even transparency with m

2026

19.17 Carats Natural Ceylon Soft Milky White Moonstone Loose Gemstone, 70FE

ThousandPlanetSathorn, Bangkok

13.69 Carats Natural Ceylon Soft Milky White Moonstone Loose Gemstone, 62FE: This natural Ceylon moonstone carries a smooth milky white base with subtle gentle adularescent glow across its polished surface, measured at 18.8x14.4x7mm, showcasing clean even transparency with min

2026

13.69 Carats Natural Ceylon Soft Milky White Moonstone Loose Gemstone, 62FE

ThousandPlanetSathorn, Bangkok

8.96 Carats Natural Brazil Hot Pink Topaz Loose Gemstone, 14FE: This natural Brazil topaz holds dimension measurements of 15.5x9x6.5mm, displaying an intense vibrant hot pink shade created through surface color coating treatment, its transparent crystal body carri

2026

8.96 Carats Natural Brazil Hot Pink Topaz Loose Gemstone, 14FE

ThousandPlanetSathorn, Bangkok

12.41 Carats Natural Madagascar Deep Cobalt Blue Sapphire Loose Gemstone, 16FE: This Madagascar sapphire cabochon has dimensions measuring 17.1x14.3x4.5mm, featuring rich cobalt blue color blended with soft natural pale veining that creates unique layered visual texture across th

2026

12.41 Carats Natural Madagascar Deep Cobalt Blue Sapphire Loose Gemstone, 16FE

ThousandPlanetSathorn, Bangkok

2.55 Carats Natural Cool White Moissanite Loose Gemstone, 43FE: This cool white moissanite holds dimension measurements of 9x5.4mm, delivering exceptional light dispersion that generates vivid rainbow sparkle across its fully transparent body, with faint microscop

2026

2.55 Carats Natural Cool White Moissanite Loose Gemstone, 43FE

ThousandPlanetSathorn, Bangkok

12.37ct Natural Australian Queensland Matrix Boulder Opal Triangular Cabochon, 24AV: Hand polished smooth symmetrical triangle cabochon of natural Queensland matrix boulder opal, featuring rich speckled brown ironstone matrix split between warm amber-brown opal bands at the apex and t

2026

12.37ct Natural Australian Queensland Matrix Boulder Opal Triangular Cabochon, 24AV

ThousandPlanetSathorn, Bangkok

25.77ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 100AX: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

25.77ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 100AX

ThousandPlanetSathorn, Bangkok

58.40ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 37AX: Natural sliced slab rough of Queensland boulder opal cutting grade, featuring rich color ironstone matrix with patterns. The face clearly reveals extensive opal veining and pocket formations running t

2026

58.40ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 37AX

ThousandPlanetSathorn, Bangkok

Pierre-Quentin Chedel – Fossil Shell Study – Hand-colored engraving (18th Century): "Coquillages Fossiles" This hand-colored engraving presents a paleontological study illustrating numerous fossilized sea shells categorized into univalves, bivalves, and multivalves. The composition o

2026

Pierre-Quentin Chedel – Fossil Shell Study – Hand-colored engraving (18th Century)

Dahlstroms AuctioneerAvignon, Provence-Alpes-Cote d'Azur

Two Geological Specimens Rock Stone Mineral: Two geological specimens includes a possible bloodstone specimen (6"L x 7"W x 5.5"H) and a polished chrysanthemum stone (6.5"L x 6"W x 4.5"H). Condition report: Good condition, please examine all phot

2026

Two Geological Specimens Rock Stone Mineral

C Biddle Auction Gallery Inc.Oakland Park, FL

Group of Stone and Petrified Wood Bookends and Garnitures: 19 pieces total, largest: 9 3/4 x 7 in.

2026

Group of Stone and Petrified Wood Bookends and Garnitures

Abell AuctionLos Angeles, CA

Late Cretaceous Fossil Egg Clutch Attributed to Troodon: North America or Siberia, Late Cretaceous period, ca. 77.5 to 76.5 million years ago. A clutch of eleven Troodon eggs, beautifully preserved in their reddish-brown matrix. The name Troodon refers to s

2026

Late Cretaceous Fossil Egg Clutch Attributed to Troodon

Artemis Fine ArtsLouisville, CO

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24

Fossils Auctions

4 11/16" Thebes, Dickey COA, Calhoun Co., Illinois, Found Near the Illinois River

18" x 8 1/2" Large Mammoth Jaw and Tooth Fossil, Recovered from Alaskan Permafrost

10 3/4" Pre-Columbian Moche Culture Stirrup Vessel, Northern Coastal Peru

Pre-Columbian, Native American Artifacts

Heartland Artifact Auctions

Starts on:

Quincy, IL, US

Large Chancay Male Cuchimilco Figure, Peru

Anasazi Tularosa Style Storage Olla, Cibola Tradition

Mojave Glass Beaded Netted Collar

ARTE & ARTEMIS Pre-Columbian, Native American

Artemis Fine Arts

Starts on:

Louisville, CO, US

2 days Left

Large Congo Shrine Leopard Figure, Painted

Large Macginitiea Nobilis Fossil Leaf, Fort Union Formation, Paleocene

16th C. Franco-Flemish Stained Glass Panel, Pieta

ARTE & ARTEMIS Tribal, Ethnographic, Ancient

Artemis Fine Arts

Starts on:

Louisville, CO, US

3 days Left

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