Results for “Mineral Specimens”

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53.39 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ95: This striking Winton boulder opal rough showcases the dramatic beauty of Australian boulder opal at its finest. The polished face reveals a large, continuous sheet of opal glowing with shifting hues o

2 days Left

53.39 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ95

Est. $120-$240

$5

ThousandPlanetSathorn, Bangkok

38.35 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ92: This striking Winton boulder opal rough showcases the dramatic beauty of Australian boulder opal. The polished face reveals a broad sheet of opal glowing with shifting hues of deep cobalt blue, electr

2 days Left

38.35 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ92

Est. $90-$180

$5

ThousandPlanetSathorn, Bangkok

A Lot of Fossilized Boulder Opal Rough Specimens, 61ZJ: This lot comprises six fossilized boulder opal rough specimens, ranging in size from 2.7 to 3.5 cm, with a total weight of 83.25 grams. Each specimen retains its natural ironstone host rock matrix, ex

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A Lot of Fossilized Boulder Opal Rough Specimens, 61ZJ

Est. $30-$60

$5

ThousandPlanetSathorn, Bangkok

11.62 Carats Iridescent Blue-Green Winton Opal Rough - Natural Australian Specimen 22x10mm, 90XM: This exceptional rough opal from Winton, Australia, captivates with a vivid play of color, where intense flashes of electric green and deep celestial blue swirl through a milky, translucent base. The

2 days Left

11.62 Carats Iridescent Blue-Green Winton Opal Rough - Natural Australian Specimen 22x10mm, 90XM

Est. $60-$120

$5

ThousandPlanetSathorn, Bangkok

Collection of Nine [9] Boxed Madagascan Fossil Wood Display Pieces: Circa 135-200 million years B.P. Comprising nine specimens, each showing some bark detail and supplied in a labelled specimen tray. 433 grams total, 30-56 mm (1 1/4 - 2 1/4 in.). [9, No Reserve] From

Jun 06, 2026

Collection of Nine [9] Boxed Madagascan Fossil Wood Display Pieces

Est. £20-£30

£5

TimeLine Auctions Ltd.Harwich, Essex

14.83ct Boulder Opal Cabochon - Soft Pastel Play-of-Color Specimen, 44XM: This 14.83ct boulder opal cabochon, measuring 24x16mm, is a striking example of Australia's iconic gemstone, showcasing the delicate beauty of nature's artistry. The freeform triangular cabochon is po

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14.83ct Boulder Opal Cabochon - Soft Pastel Play-of-Color Specimen, 44XM

Est. $50-$100

$5

ThousandPlanetSathorn, Bangkok

19.97 Carats Winton Boulder Opal Rough Specimen - Natural Australian Stone, 39XP: This exquisite Winton boulder opal rough specimen showcases a brilliant band of vivid sky-blue and periwinkle play-of-color, with subtle hints of lavender iridescence that glow softly under light. Mea

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19.97 Carats Winton Boulder Opal Rough Specimen - Natural Australian Stone, 39XP

Est. $50-$100

$5

ThousandPlanetSathorn, Bangkok

Group of Two [2] Boxed Large Huanuco Pyrite and Pyrite and Quartz on Galena Crystal Specimens: Comprising an intergrown mass of pyrite crystals from Peru and a specimen of pyrite and quartz crystals on galena; each on a labelled specimen tray. 573 grams total, 54-74 mm (2 1/8 - 3 in.). [2, No R

Jun 06, 2026

Group of Two [2] Boxed Large Huanuco Pyrite and Pyrite and Quartz on Galena Crystal Specimens

Est. £30-£40

£5

TimeLine Auctions Ltd.Harwich, Essex

28.26 Carats Multicolor Iridescent Winton Opal Rough - Natural Australian Specimen 30x12mm, 82XM: This exceptional rough opal from Winton, Australia, captivates with a vivid play of color, where intense flashes of fiery orange, golden yellow, vibrant green, and deep blue swirl through a milky, tra

2 days Left

28.26 Carats Multicolor Iridescent Winton Opal Rough - Natural Australian Specimen 30x12mm, 82XM

Est. $60-$120

$5

ThousandPlanetSathorn, Bangkok

Polished Specular Haematite Specimen Collection: A group of nineteen polished, boxed specular haematite specimens, with acrylic coating. 285 grams total, 27-36 mm (1 - 1 3/8 in.). [19, No Reserve] Champion Mine, Marquette Co., Michigan, USA. Mineral

Jun 06, 2026

Polished Specular Haematite Specimen Collection

Est. £20-£30

£5

TimeLine Auctions Ltd.Harwich, Essex

3.08 Carats Boulder Opal Cabochon - Natural Matrix & Play-of-Color Specimen, 54XM: This 3.08ct boulder opal cabochon, measuring 10x9mm, is a striking example of Australia's iconic gemstone, showcasing the unique beauty of nature's artistry. The triangular cabochon is polished to a s

2 days Left

3.08 Carats Boulder Opal Cabochon - Natural Matrix & Play-of-Color Specimen, 54XM

Est. $60-$120

$5

ThousandPlanetSathorn, Bangkok

5.45 Carats Boulder Opal Cabochon - Natural Matrix Vein Specimen, 61XM: This 5.45ct boulder opal cabochon, measuring 18x9mm, is a striking example of Australia's iconic gemstone, showcasing the unique beauty of nature's artistry. The teardrop-shaped cabochon is polished t

2 days Left

5.45 Carats Boulder Opal Cabochon - Natural Matrix Vein Specimen, 61XM

Est. $60-$120

$5

ThousandPlanetSathorn, Bangkok

56.36 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ94: This impressive Winton boulder opal rough is a stunning showcase of Australian boulder opal's natural beauty. The polished face reveals a broad, continuous sheet of opal glowing with shifting hues of

2 days Left

56.36 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ94

Est. $120-$240

$5

ThousandPlanetSathorn, Bangkok

67.01 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ98: This impressive Winton boulder opal rough is a stunning showcase of Australian boulder opal's dramatic natural beauty. The polished face reveals a rich tapestry of opal and ironstone, where vivid patc

2 days Left

67.01 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ98

Est. $140-$280

$5

ThousandPlanetSathorn, Bangkok

Natural amethyst Crystal Specimen: Medium: amethyst Size: 4.3x1.5x1 inches Age/Detail: Natural Condition: great overall, check photo for condition reference. Provenance: Collection from Estate in Williamsburg LiveShipping is NOT a part

3 days Left

Natural amethyst Crystal Specimen

Est. $10-$20

$5

Treasured AuctionsJamaica, NY

19.83 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ93: This striking Winton boulder opal rough showcases the dramatic beauty of Australian boulder opal. The polished face reveals a vivid sheet of opal glowing with intense, saturated hues of electric viole

2 days Left

19.83 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ93

Est. $80-$160

$5

ThousandPlanetSathorn, Bangkok

An Australian Koroit Yowah Boulder Opal Rough Lot, 46.85g, 48ZH: A parcel of rough Koroit Yowah boulder opal, with individual pieces ranging from 3-4 cm in size, totaling 46.85 grams. The specimens are characterized by their ironstone host rock matrix, which displa

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An Australian Koroit Yowah Boulder Opal Rough Lot, 46.85g, 48ZH

Est. $50-$100

$5

ThousandPlanetSathorn, Bangkok

1.08 Carats Natural Tanzanite - Oval Faceted Loose Gemstone, 92WE: Natural oval-faceted tanzanite gemstone, mined from the iconic Merelani Hills of Tanzania. This specimen exhibits a stunning, vivid blue-violet hue with subtle pleochroism, shifting between cool blue

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1.08 Carats Natural Tanzanite - Oval Faceted Loose Gemstone, 92WE

Est. $40-$80

$5

ThousandPlanetSathorn, Bangkok

29.04 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ97: This substantial Winton boulder opal rough is a stunning example of Australian opal at its most dramatic. The natural ironstone matrix forms a rugged, textured canvas, interspersed with vivid veins an

2 days Left

29.04 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ97

Est. $100-$200

$5

ThousandPlanetSathorn, Bangkok

27.47 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ90: This striking Winton boulder opal rough showcases the dramatic beauty of Australian boulder opal. The polished face reveals a broad sheet of opal glowing with shifting hues of deep cobalt blue, violet

2 days Left

27.47 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ90

Est. $80-$160

$5

ThousandPlanetSathorn, Bangkok

35.90 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ96: This striking Winton boulder opal rough is a dramatic example of Australian boulder opal's raw beauty. The polished face reveals a broad, vibrant sheet of opal glowing with intense, saturated hues of

2 days Left

35.90 Carats Winton Boulder Opal Rough Specimen - Natural Queensland Origin, LZ96

Est. $90-$180

$5

ThousandPlanetSathorn, Bangkok

1.18 Carats Natural Tanzanite - Oval Faceted Loose Gemstone, 91WE: Natural oval-faceted tanzanite gemstone, sourced from the exclusive Merelani Hills of Tanzania. This exceptional specimen showcases a striking, vivid blue-violet color with iconic pleochroism, shiftin

2 days Left

1.18 Carats Natural Tanzanite - Oval Faceted Loose Gemstone, 91WE

Est. $40-$80

$5

ThousandPlanetSathorn, Bangkok

Ethiopian Welo Opal Rough - Natural Unpolished Gemstone Lot, 15WS: A collection of natural Ethiopian Welo opal rough pieces, ranging in size from 1-3 cm and totaling 49.42 grams. The opals display characteristic milky to translucent base tones with vibrant, shifting

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Ethiopian Welo Opal Rough - Natural Unpolished Gemstone Lot, 15WS

Est. $60-$120

$5

ThousandPlanetSathorn, Bangkok

219 Carats Prehnite Cabochon Suite - Natural Malagasy Single Parcel, 68ZJ: This substantial suite of eight prehnite cabochons, ranging in size from 2.1 to 3.1cm, features a palette of soft, translucent green to pale yellow-green hues, characteristic of high-quality prehnite

2 days Left

219 Carats Prehnite Cabochon Suite - Natural Malagasy Single Parcel, 68ZJ

Est. $30-$60

$5

ThousandPlanetSathorn, Bangkok

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