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DECORATIVE FOSSIL STONE SPHERE ON METAL STAND: POLISHED FOSSIL STONE SPHERE DISPLAYED ON BLACK METAL DECORATIVE STAND Decorative polished fossil stone sphere featuring dense natural fossil inclusions and organic patterning in charcoal, taupe, and

3 days Left

DECORATIVE FOSSIL STONE SPHERE ON METAL STAND

DejaVu Estate Sales & Auctions, LLC

Est. $30-$60

Albert de Grossouvre (1849-1932) – Ammonite Fossil – Lithograph (1894): "Plate 28." The illustration displays a monochromatic rendering of a fossilized ammonite, highlighting the intricate spiral structure and ribbed surface of the shell. This lithograph serves as a scien

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Albert de Grossouvre (1849-1932) – Ammonite Fossil – Lithograph (1894)

Dahlstroms Auctioneer

Rare Blue Aragonite Mineral Specimen from Yunnan, China: Rare Blue Aragonite Mineral Specimen from Yunnan, China This rare blue aragonite specimen from Yunnan, China, features a striking sky-blue color, enhanced by its unique copper content. The aragonite

5 days Left

Rare Blue Aragonite Mineral Specimen from Yunnan, China

Weatherham Estate Treasures

Est. $80-$100

Albert de Grossouvre (1849-1932) – Paleontological Study of Ammonite Fossils – Lithograph (1894): Paleontological Study of Ammonite Fossils displays various fossilized ammonite specimens, illustrating differences in shell structure and ornamentation. This work is a scientific lithograph published

Apr 05, 2026

Albert de Grossouvre (1849-1932) – Paleontological Study of Ammonite Fossils – Lithograph (1894)

Proverde Auctions

Est. $75-$150

Natural Opal Quartz Heart Restored Mineral Specimen: Natural Opal Quartz Heart Restored Mineral Specimen Weighing 56 grams this heart-shaped specimen features natural opal quartz with delicate translucence and subtle flashes of opalescence. Carefully r

5 days Left

Natural Opal Quartz Heart Restored Mineral Specimen

Weatherham Estate Treasures

Est. $120-$240

Athanasius Kircher (1602-1680) – Hydraulic Machines and Pneumatic Experiments – Engraving: "Liber Quintus" features technical engravings of complex mechanical systems, including a dual-bellows hydraulic pump and a pneumatic experiment demonstrating the pressure of air on water. This page is

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Athanasius Kircher (1602-1680) – Hydraulic Machines and Pneumatic Experiments – Engraving

Dahlstroms Auctioneer

Albert de Grossouvre (1849-1932) - Ammonite Fossil - Lithograph (1894): The illustration depicts a detailed monochrome rendering of an ammonite fossil, highlighting the intricate spiral structure and ribbed exterior of the shell. This lithograph serves as a scientific doc

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Albert de Grossouvre (1849-1932) - Ammonite Fossil - Lithograph (1894)

Dahlstroms Auctioneer

Natural Agate Crystal Cave with Quartz Crystal Interior: Natural Agate Crystal Cave with Quartz Crystal Interior This 60 gram natural agate crystal cave reveals a striking quartz crystal interior, showcasing shimmering points nestled within a smooth, bande

5 days Left

Natural Agate Crystal Cave with Quartz Crystal Interior

Weatherham Estate Treasures

Est. $110-$220

Athanasius Kircher (1602-1680) – Hydraulic Experiment: Subterranean Fountains – Engraving: "Liber Quintus, Modus VI" illustrates a complex hydraulic mechanism designed to explain the movement of subterranean water and the formation of springs within mountains. This woodcut engraving origina

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Athanasius Kircher (1602-1680) – Hydraulic Experiment: Subterranean Fountains – Engraving

Dahlstroms Auctioneer

Athanasius Kircher (1602-1680) – Meteorological Studies: Origin of Winds – Engraving (1680): "De Ventorum Origine" illustrates various experimental and natural phenomena used to explain the movement of air and the formation of storms, including a diagram of a flask and a topographical view of

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Athanasius Kircher (1602-1680) – Meteorological Studies: Origin of Winds – Engraving (1680)

Dahlstroms Auctioneer

James E DeKay - Plate LIV The Carolina Tit, The Mourning Warbler and The Yellow-throat 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate LIV The Carolina Tit, The Mourning Warbler and The Yellow-throat 1844

Britannica Auctions Ltd

Est. £20-£40

James E DeKay - Plate IX The Hawk Owl and The Snow Owl 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate IX The Hawk Owl and The Snow Owl 1844

Britannica Auctions Ltd

Est. £20-£40

DECORATIVE FOSSIL STONE SPHERE ON METAL STAND: POLISHED FOSSIL STONE SPHERE DISPLAYED ON BLACK METAL DECORATIVE STAND Decorative polished fossil stone sphere featuring dense natural fossil inclusions and organic patterning in charcoal, taupe, and

3 days Left

DECORATIVE FOSSIL STONE SPHERE ON METAL STAND

DejaVu Estate Sales & Auctions, LLC

Est. $30-$60

2.52 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 12.7x8.3mm, 6XM: This striking 2.52-carat Koroit boulder opal cabochon is a natural geological masterpiece, featuring a dense, intricate matrix of swirling chocolate-brown ironstone, interwoven with vivid veins of iri

4 days Left

2.52 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 12.7x8.3mm, 6XM

Est. $60-$120

James E DeKay - Plate CII The American Avoset, The Marlin and The American Avoset 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate CII The American Avoset, The Marlin and The American Avoset 1844

Britannica Auctions Ltd

Est. £20-£40

James E DeKay -Plate LVIII The Black-throated Blue Warbler, The Cape-May Warbler and The Nashville: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay -Plate LVIII The Black-throated Blue Warbler, The Cape-May Warbler and The Nashville

Britannica Auctions Ltd

Est. £20-£40

James E DeKay - Plate XXXV The Solitary Greenlet and The Yellow-throated Greenlet 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate XXXV The Solitary Greenlet and The Yellow-throated Greenlet 1844

Britannica Auctions Ltd

Est. £20-£40

James E DeKay - Plate CXXVI The Cayenne Tern and The Black Tern 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate CXXVI The Cayenne Tern and The Black Tern 1844

Britannica Auctions Ltd

Est. £20-£40

James E DeKay - Plate XLIV The Bluebird and The American Titlark 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate XLIV The Bluebird and The American Titlark 1844

Britannica Auctions Ltd

Est. £20-£40

4.47 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 14.8x8.5mm, 5XM: This striking 4.47-carat Koroit boulder opal cabochon is a natural geological masterpiece, featuring delicate, branching veins of iridescent play-of-color that snake through a deep, chocolate-brown ir

4 days Left

4.47 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 14.8x8.5mm, 5XM

Est. $60-$120

James E DeKay - Plate XCVII The Ruff and The Red-breasted Sandpiper 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate XCVII The Ruff and The Red-breasted Sandpiper 1844

Britannica Auctions Ltd

Est. £20-£40

James E DeKay - Plate XXXIX The Mocking-bird, The Cat-bird and The Wood Thrush 1844: This original and striking 19th century engraving, drawn mostly from living specimens, have been superbly hand painted by professional colourists.James E. DeKay (1792 ? 1851) was an American zoologist

6 days Left

James E DeKay - Plate XXXIX The Mocking-bird, The Cat-bird and The Wood Thrush 1844

Britannica Auctions Ltd

Est. £20-£40

7.238 Carats Violet and Yellow Ametrine - Natural Brazilian Gemstone, LZ275: This impressive octagon step-cut ametrine showcases a striking, well-defined fusion of deep violet and warm golden-yellow hues, a hallmark of this dual-colored quartz. The step-cut faceting enhances t

4 days Left

7.238 Carats Violet and Yellow Ametrine - Natural Brazilian Gemstone, LZ275

Est. $100-$200

3.52 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 13.2x9.9mm, 19XM: This striking 3.52-carat Koroit boulder opal cabochon is a natural work of geological art, featuring vivid veins of electric blue and iridescent green play-of-color that snake through a rich, earthy i

4 days Left

3.52 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 13.2x9.9mm, 19XM

Est. $60-$120

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