Results for “geology”

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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

1 day Left

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

Est.

$45

-

$200

$45

Lazo HeritageThung Wat Don, Sathorn, Bangkok, Bangkok

A Chinese Nephrite Jade Landscape Plaque Pendant, 81FC: Carved from pale celadon to grey-green nephrite jade with subtle tonal variation and minor natural inclusions, the object is worked as a vertically oriented plaque with a gently curved upper edge. The

3 hrs Left

A Chinese Nephrite Jade Landscape Plaque Pendant, 81FC

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

$9.12ct Natural Australian Queensland Matrix Boulder Opal Cabochon, 21AV: Hand polished small rounded rectangular cushion cabochon crafted from natural Queensland matrix boulder opal, featuring dark speckled ironstone host matrix interwoven with intricate fractal opal veins$

3 hrs Left

9.12ct Natural Australian Queensland Matrix Boulder Opal Cabochon, 21AV

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

43ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 74AY: 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

3 hrs Left

43ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 74AY

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

28.28ct Natural Mauritania Ruby Rough (Unheated), 61AT: Natural unheated corundum rough sourced from Mauritania gem deposits, featuring a tapered upright crystalline form blanketed by grey silicate host matrix with scattered patches of deep magenta-pink ru

3 hrs Left

28.28ct Natural Mauritania Ruby Rough (Unheated), 61AT

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

80ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 1FC: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

80ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 1FC

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

Japanese Suiseki Viewing Stone: Natural Japanese suiseki viewing stone, a sculptural rock appreciated for its evocative resemblance to a landscape or geological formation. Suiseki stones are traditionally collected for their natural

Buy Now

Japanese Suiseki Viewing Stone

$50

Williamson Auction GalleryHollywood, FL

80ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 23FC: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

80ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 23FC

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

130ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 98FB: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

130ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 98FB

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

44ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 15FC: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

44ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 15FC

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

Annual Report Smithsonian Institution 1865: Annual Report of the Board of Regents of The Smithsonian Institution, Showing the Operations, Expenditures, and Condition of the Institution for the Year 1865 Contains brief report on the 1865 fire at

Jul 18, 2026

Annual Report Smithsonian Institution 1865

Est.

$150

-

$200

$80

Orange County Estate LiquidatorsOtisville, NY

103ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 1YQ: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

1 day Left

103ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 1YQ

Est.

$10

-

$200

$10

Lazo HeritageThung Wat Don, Sathorn, Bangkok, Bangkok

139ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 5YQ: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

1 day Left

139ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 5YQ

Est.

$10

-

$200

$10

Lazo HeritageThung Wat Don, Sathorn, Bangkok, Bangkok

137ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 100FB: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

137ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 100FB

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

12.88 Carats Natural Arizona Sleeping Beauty Turquoise Cabochon Parcel, 90WC: This curated parcel features polished oval cabochons of genuine Arizona Sleeping Beauty turquoise, exhibiting vivid saturated sky-blue color characteristic of this renowned deposit, with subtle natura

1 day Left

12.88 Carats Natural Arizona Sleeping Beauty Turquoise Cabochon Parcel, 90WC

Est.

$25

-

$200

$25

Lazo HeritageThung Wat Don, Sathorn, Bangkok, Bangkok

34.30ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 58AX: 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

3 hrs Left

34.30ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 58AX

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

Trap Rock Minerals of New Jersey: Trap Rock Minerals of New Jersey New Jersey Geological Survey Bulletin 64. Large map present in rear. Extremely rare Author: Brian Mason Illustrations: B/W

Jul 18, 2026

Trap Rock Minerals of New Jersey

Est.

$200

-

$250

$100

Orange County Estate LiquidatorsOtisville, NY

Birth of an Island by Millicent E. Selsam, Winifred Lubell 1959 : Birth of an Island by Millicent E. Selsam, Winifred Lubell 1959 is a vintage educational children’s book explaining how volcanic islands are formed. Originally produced for young readers during

Jul 26, 2026

Birth of an Island by Millicent E. Selsam, Winifred Lubell 1959

Est.

$45

-

$95

$45

SJ AuctioneersBrooklyn, NY

100ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 10FC: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

100ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 10FC

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

107ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 7FC: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

107ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 7FC

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

123ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 99FB: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

123ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 99FB

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

121ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 96FB: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

121ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 96FB

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

31.52ct Natural Mauritania Ruby Rough (Unheated), 60AT: Natural unheated corundum rough sourced from Mauritanian gem mineral deposits, featuring an irregular tapered crystalline form with concentrated deep magenta ruby coloration localized at the specimen'

3 hrs Left

31.52ct Natural Mauritania Ruby Rough (Unheated), 60AT

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

107ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 93FB: This unpolished mineral rough is natural ruby zoisite sourced from Tanzania, exhibiting distinct banded mineral segregation of vibrant green zoisite, magenta ruby crystals, and dark hornblende inclusi

3 hrs Left

107ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 93FB

Est.

$10

-

$200

$10

ThousandPlanetThung Wat Don, Sathorn, Bangkok

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