Daniel Arsham Rocks Minerals And Fossils

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11.85 Carat ---- Ceylon Blue Sapphire ---- Pear Cut: A highly rare and magnificent gemstone. Originating from Sri Lanka, these stones are globally renowned for their brilliant luster, transparent bodies, and vivid cornflower blue hues.

2026

11.85 Carat ---- Ceylon Blue Sapphire ---- Pear Cut

California GemstonesSan Diego, CA

11.65 Carat ----Purple Alexandrite ---- Octagon Fancy Cut: A substantial and uniquely shaped gemstone. Alexandrite is world-renowned for its chameleon-like ability to shift colors under different lighting.

2026

11.65 Carat ----Purple Alexandrite ---- Octagon Fancy Cut

California GemstonesSan Diego, CA

12.00 Carat ---- Ceylon Java Plum Sapphire ---- Round Cut: A high-carat-weight, natural, and rare gemstone, typically characterized by a deep, rich purple or violet-purple hue originating from Sri Lanka (formerly Ceylon). This specific color variety is highly

2026

12.00 Carat ---- Ceylon Java Plum Sapphire ---- Round Cut

California GemstonesSan Diego, CA

12.85 Carat ---- Purple Alexandrite ---- Oval Cut: This alexandrite has stunning color change with intense colors, and very clean clarity. It's an oval mixed cut, which is common for alexandrite.

2026

12.85 Carat ---- Purple Alexandrite ---- Oval Cut

California GemstonesSan Diego, CA

10.00 Carat ---- South African Purple Amethyst ----Fancy Kite Cut: A faceted blue spinel is a remarkably large, rare, and eye-catching gemstone. Combining an organic, asymmetrical "freeform" shape with precision faceting, it is prized for its vivid brilliance, deep b

2026

10.00 Carat ---- South African Purple Amethyst ----Fancy Kite Cut

California GemstonesSan Diego, CA

Albert de Grossouvre – Study of Ammonite Fossils – Collotype / Heliogravure (1894): "Pl. III" presents a concise scientific paleontological study showcasing several prehistoric ammonite fossil specimens. The composition displays different lateral, ventral, and edge views of the fossi

2026

Albert de Grossouvre – Study of Ammonite Fossils – Collotype / Heliogravure (1894)

Proverde AuctionsAvignon, Provence-Alpes-C?te d?Azur

Albert de Grossouvre – Paleontological Study of Prehistoric Fossils – Collotype / Heliogravure: "Pl. VIII" presents a concise scientific paleontological study showcasing several prehistoric ammonite fossil specimens. The composition displays different lateral and keel views of the fossilized cep

2026

Albert de Grossouvre – Paleontological Study of Prehistoric Fossils – Collotype / Heliogravure

Proverde AuctionsAvignon, Provence-Alpes-C?te d?Azur

Albert de Grossouvre – Paleontological Study of Ammonite Fossils – Collotype / Heliogravure: "Pl. XXIX" presents a concise scientific paleontological study showcasing several prehistoric ammonite fossil specimens. The composition displays different lateral and ventral views of the fossilized

2026

Albert de Grossouvre – Paleontological Study of Ammonite Fossils – Collotype / Heliogravure

Proverde AuctionsAvignon, Provence-Alpes-C?te d?Azur

Frederick Polydore Nodder – Natural History Study of an Electric Ray: "The Electric Ray" This natural history work features a detailed zoological study showcasing the dorsal view of a torpedo ray with characteristic dark, mottled patterning and prominent spiracles. The

2026

Frederick Polydore Nodder – Natural History Study of an Electric Ray

Proverde AuctionsAvignon, Provence-Alpes-C?te d?Azur

Lot of Seashells, Coral, & Starfish - Up to 7".: The lot contains over 85 items. Some of the specimens included are Cymbiola Vespertilio, Humpback Cowries, Lambis, Magpie, Fasciolaria Tulipa, Chicoreus Ramosus, Murex, Sea Biscuit, and more. One shel

2026

Lot of Seashells, Coral, & Starfish - Up to 7".

Direct Auction Galleries Chicago, IL

Lot: Conch & Volute Seashells, Desert Rose Cluster: Overall, this lot looks to be in good condition. There are some scratches, nicks, and cracks present. The largest item measures 13 1/2" x 9" x 5 1/4". The smallest item measures 7 5/8" x 5 1/8" x 4".

2026

Lot: Conch & Volute Seashells, Desert Rose Cluster

Direct Auction Galleries Chicago, IL

Natural Amethyst Mineral Rock Cluster: Natural Amethyst Mineral Rock Cluster. Over a foot long, with large crystalline shards and green felt attached to the rockiest part to avoid scuffing a surface when displayed. Size: 13 x 8 x 4 i

2026

Natural Amethyst Mineral Rock Cluster

Sarasota Estate AuctionSARASOTA, FL

(2) Decorative Desk Items, Diamond Cut Faceted Glass Weight and Sliced Blue Agate Coaster: (2) Decorative Desk Items, Diamond Cut Faceted Glass Weight and Sliced Blue Agate Coaster. Polished blue agate slice with concentric white and deep blue rings alongside a large, clear facet

2026

(2) Decorative Desk Items, Diamond Cut Faceted Glass Weight and Sliced Blue Agate Coaster

Sarasota Estate AuctionSARASOTA, FL

LARGE NATURAL SMOKY QUARTZ SPECIMEN ON WOODEN BASE: *A substantial raw mineral specimen of natural smoky quartz, featuring translucent crystalline structures and rugged, earthy facets. The block is mounted on a minimalist, square black-painted wooden p

2026

LARGE NATURAL SMOKY QUARTZ SPECIMEN ON WOODEN BASE

Cornell Auctions, Objects & TradeBellport , NY

8.3 Carat ---- Montana Green Sapphire ---- Trillion Cut: Spectacular, and highly valuable gemstone, characterized by an oversized scale, mint color zoning, and striking geometric brilliance. Because trillion cuts are usually reserved for smaller stones, an

2026

8.3 Carat ---- Montana Green Sapphire ---- Trillion Cut

California GemstonesSan Diego, CA

11.50 Carat ---- Kashmiri Blue Sapphire ---- Cushion Cut: High Value-Almost Purple. Highly coveted collector's gemstone. A captivating, royal purple hue—often rich with violet and plum undertones. Known for microscopic, parallel "silk" (rutile) needle incl

2026

11.50 Carat ---- Kashmiri Blue Sapphire ---- Cushion Cut

California GemstonesSan Diego, CA

MIXED FOSSIL LOT ROCK STONE LAPIDARY SPECIMEN: MIXED FOSSIL LOT ROCK STONE LAPIDARY SPECIMEN — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-h

2026

MIXED FOSSIL LOT ROCK STONE LAPIDARY SPECIMEN

Col. Christie Hatman AuctioneersThayer, MO

MOONSTONE AND PERIDOT GEMSTONE LOT: MOONSTONE AND PERIDOT GEMSTONE LOT — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-house shippi

2026

MOONSTONE AND PERIDOT GEMSTONE LOT

Col. Christie Hatman AuctioneersThayer, MO

AMETHYST ROCK STONE LAPIDARY SPECIMEN: AMETHYST ROCK STONE LAPIDARY SPECIMEN — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-house shi

2026

AMETHYST ROCK STONE LAPIDARY SPECIMEN

Col. Christie Hatman AuctioneersThayer, MO

STONE SLABS ROCK STONE LAPIDARY SPECIMEN: STONE SLABS ROCK STONE LAPIDARY SPECIMEN — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-house

2026

STONE SLABS ROCK STONE LAPIDARY SPECIMEN

Col. Christie Hatman AuctioneersThayer, MO

AMETHYST SET OF 3: AMETHYST SET OF 3 — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-house shipping! We have MANY

2026

AMETHYST SET OF 3

Col. Christie Hatman AuctioneersThayer, MO

AQUAMARINE ROCK STONE LAPIDARY SPECIMEN: AQUAMARINE ROCK STONE LAPIDARY SPECIMEN — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-house s

2026

AQUAMARINE ROCK STONE LAPIDARY SPECIMEN

Col. Christie Hatman AuctioneersThayer, MO

AQUAMARINE ROCK STONE LAPIDARY SPECIMEN: AQUAMARINE ROCK STONE LAPIDARY SPECIMEN — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-house s

2026

AQUAMARINE ROCK STONE LAPIDARY SPECIMEN

Col. Christie Hatman AuctioneersThayer, MO

AQUAMARINE ROCK STONE LAPIDARY SPECIMEN: AQUAMARINE ROCK STONE LAPIDARY SPECIMEN — Part of our Discover Mystic Finds, Crystals and Gems auction at HATMAN'S Auctions! Please see photos for measurements and condition. YES, we have in-house s

2026

AQUAMARINE ROCK STONE LAPIDARY SPECIMEN

Col. Christie Hatman AuctioneersThayer, MO

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