Coral Fossils

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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

14.52 Carats Natural Ceylon Soft Milky White Moonstone Loose Gemstone, 72FE: This natural Ceylon moonstone carries a smooth milky white base with subtle gentle adularescent glow across its polished surface, measured at 16.2x12.6x9.4mm, showcasing clean even transparency with m

2026

14.52 Carats Natural Ceylon Soft Milky White Moonstone Loose Gemstone, 72FE

ThousandPlanetSathorn, Bangkok

17.46 Carats Natural Madagascar Deep Cobalt Blue Sapphire Loose Gemstone, 22FE: This Madagascar sapphire cabochon has dimensions measuring 18.8x15.6x5.7mm, featuring rich cobalt blue color blended with soft natural pale veining that creates unique layered visual texture across th

2026

17.46 Carats Natural Madagascar Deep Cobalt Blue Sapphire Loose Gemstone, 22FE

ThousandPlanetSathorn, Bangkok

24.70 Carats Natural Madagascar Deep Cobalt Blue Sapphire Loose Gemstone, 23FE: This Madagascar sapphire cabochon has dimensions measuring 19.2x17x6.6mm, featuring rich cobalt blue color blended with soft natural pale veining that creates unique layered visual texture across the

2026

24.70 Carats Natural Madagascar Deep Cobalt Blue Sapphire Loose Gemstone, 23FE

ThousandPlanetSathorn, Bangkok

25.31 Carats Natural Brazil Golden Needle Rutile Quartz Loose Gemstone, 66FG: This Brazil golden needle rutile quartz cabochon measures 18.1x16.5x11mm, featuring prominent bright golden rutile needle inclusions scattered naturally throughout its clear transparent quartz base, t

2026

25.31 Carats Natural Brazil Golden Needle Rutile Quartz Loose Gemstone, 66FG

ThousandPlanetSathorn, Bangkok

16.32 Carats Natural Ceylon Warm Peach Moonstone Loose Gemstone, 79FE: This natural Ceylon moonstone has dimension measurements of 20.6x14.2x7.7mm, showcasing a smooth warm peach base tone paired with subtle soft adularescent sheen that glides gently across the polished

2026

16.32 Carats Natural Ceylon Warm Peach Moonstone Loose Gemstone, 79FE

ThousandPlanetSathorn, Bangkok

6.32 Carats Natural Brazilian Soft Mint Green Beryl Loose Gemstone, 100FE: This natural Brazilian green beryl measures 12.5x10.4x7mm, presenting a soft uniform mint green tone throughout its translucent crystal matrix, dotted with fine scattered dark mineral specks and subtl

2026

6.32 Carats Natural Brazilian Soft Mint Green Beryl Loose Gemstone, 100FE

ThousandPlanetSathorn, Bangkok

25.95ct Natural Unheated Sri Lankan Purplish Blue Sapphire Rough, 76FC: This natural corundum rough is an unheated purplish blue sapphire sourced from Sri Lankan alluvial gem deposits, featuring an irregular natural native form with residual pale yellow-brown mineral matr

2026

25.95ct Natural Unheated Sri Lankan Purplish Blue Sapphire Rough, 76FC

ThousandPlanetSathorn, Bangkok

103ct Natural Type A Burmese Jadeite Jade Polished Sliced Rough, 76AZ: 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

103ct Natural Type A Burmese Jadeite Jade Polished Sliced Rough, 76AZ

ThousandPlanetSathorn, Bangkok

144ct Natural Type A Burmese Jadeite Jade Polished Sliced Rough, 89AZ: 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

144ct Natural Type A Burmese Jadeite Jade Polished Sliced Rough, 89AZ

ThousandPlanetSathorn, Bangkok

39.24ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 65AY: 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

39.24ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 65AY

ThousandPlanetSathorn, Bangkok

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

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

Collection of Eleven Ammonite Fossils, Iridescent and Cut: North Africa, Morocco, Devonian to Cretaceous, ca. 409 to 66 million years ago. A collection of eleven ammonite fossils representing multiple species, ranging from a large matrix-embedded specimen wit

2026

Collection of Eleven Ammonite Fossils, Iridescent and Cut

Artemis Fine ArtsLouisville, CO

Large Ordovician Trilobite (Burmeisterella), Morocco: Morocco. Paleozoic Era, Ordovician Period, ca. 485–444 million years old. A well-preserved fossil trilobite identified as Burmeisterella, presented in strong relief with prominent cephalon, segm

2026

Large Ordovician Trilobite (Burmeisterella), Morocco

Artemis Fine ArtsLouisville, CO

Lucite Pink & Purple 'Cool' Abstract Sculpture: Lucite Pink & Purple 'Cool' Abstract Sculpture Late 20th Century, USA Contemporary abstract lucite sculpture, featuring an energetic arrangement of intersecting ribbon-like forms in translucent pink,

2026

Lucite Pink & Purple 'Cool' Abstract Sculpture

Akiba GalleriesDania Beach, FL

Large Postmodern Purple Lucite Abstract Sculpture: Large Postmodern Purple Lucite Abstract Sculpture Late 20th Century, USA Large contemporary abstract sculpture crafted from translucent purple lucite or acrylic, featuring a dramatic openwork organic

2026

Large Postmodern Purple Lucite Abstract Sculpture

Akiba GalleriesDania Beach, FL

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Fossils Auctions

Saber-Toothed Tiger Fossil Skull, Late Miocene — Complete Dentition

Mimbres Black-on-White Pottery Bowl - Standing Woman, Kill Hole

Persian Siljuk Bronze Lamp Stand, Khorasan Region

Fine Fossils, Native American, Asian, Ethno

Artemis Fine Arts

Starts on:

Louisville, CO, US

4 days Left

Michoacan Pottery Figure - Seated Dignitary in Headdress

Prehistoric Complete Oreodont Femur Bone Fossil

18th c. Italian Engraving after Reni - Apollo & Aurora

VARIETY SALE Pre-Columbian, Ethnographic Art

Artemis Fine Arts

Starts on:

Louisville, CO, US

5 days Left

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

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