Results for “geology”

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1.92 Carats Natural Pinkish Purple Rhodolite Garnet Oval Faceted Loose Gemstone, 64TS: This garnet material forms within natural geological formations and undergoes precise faceting and high-gloss polishing via professional lapidary techniques. Minor internal pinpoint inclusions and fai

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1.92 Carats Natural Pinkish Purple Rhodolite Garnet Oval Faceted Loose Gemstone, 64TS

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

1.50 Carats Natural Pale Yellow Apatite Faceted Loose Gemstone, 45XY: This apatite specimen is sourced from natural geological deposits and shaped with professional faceting and high-gloss polishing work across the outer facet surfaces. Minute internal mineral inclusion

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1.50 Carats Natural Pale Yellow Apatite Faceted Loose Gemstone, 45XY

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

46 Carats Natural Vibrant Green Chrome Diopside Rough Specimen, 35YS: This is an untreated natural chrome diopside mineral specimen formed through natural geological processes, displaying rich green coloration caused by chromium content within its crystalline structure.

2026

46 Carats Natural Vibrant Green Chrome Diopside Rough Specimen, 35YS

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

3.94 Carats Natural Swiss Blue Topaz Loose Gemstone, 95WJ: This genuine natural swiss blue topaz displays consistent saturated blue coloration inherent to unprocessed natural mineral specimens. Formed through natural geological formation, the stone carries su

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3.94 Carats Natural Swiss Blue Topaz Loose Gemstone, 95WJ

Est.

$25

-

$200

$25

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

Banded Agate: Natural Rough Banded Agate Specimen This natural banded agate specimen showcases striking layers of gray, cream, brown, and black, revealing the intricate patterns formed through natural geological pr

Sep 27, 2026

Est.

$200

-

$300

$100

Bellerose, NY

A M Imperial Inc

Hand-Carved Serpentine Cabbage Ornament (Symbolizing Fortune), Modern, 20th Century: Measurements: Length 11.5cm(4.53in), Height 6cm(2.36in), Weight 253gCondition & Provenance: The carving is fully intact without chips, hidden cracks or stone repairs, carved from one solid piece of na

Sep 26, 2026

Hand-Carved Serpentine Cabbage Ornament (Symbolizing Fortune), Modern, 20th Century

Est.

$300

-

$500

$100

Dublin, CA

Castle Valley Art Gallery Inc.

4.2

(30)

2.15 Carats Natural Pinkish Purple Rhodolite Garnet Pear Faceted Loose Gemstone, 68TS: This garnet material forms within natural geological formations and undergoes precise faceting and high-gloss polishing via professional lapidary techniques. Minor internal pinpoint inclusions and fai

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2.15 Carats Natural Pinkish Purple Rhodolite Garnet Pear Faceted Loose Gemstone, 68TS

Est.

$15

-

$200

$15

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

Laguna Agate: Laguna Agate – Face Polished with Crystal Cave, Druzy & Botryoidal Formation This natural Laguna agate features a beautifully face-polished surface showcasing rich reddish-brown, cream, and gray

Sep 27, 2026

Est.

$300

-

$400

$100

Bellerose, NY

A M Imperial Inc

$8.84ct Natural Multicolor Fire Ethiopian Welo Solid Opal Cabochon, 65TY: Formed from natural silica deposits within Ethiopian mineral veins, this solid opal cabochon is polished to a smooth domed surface that reveals inherent light diffraction properties. Vibrant patchwork$

2026

8.84ct Natural Multicolor Fire Ethiopian Welo Solid Opal Cabochon, 65TY

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

3.08 Carats Natural Green Rutilated Peridot Pear Faceted Loose Gemstone, 73XY: This peridot forms within natural geological deposits and is precision faceted and highly polished with professional lapidary work. The distinct needle-shaped rutile inclusions scattered throughout th

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3.08 Carats Natural Green Rutilated Peridot Pear Faceted Loose Gemstone, 73XY

Est.

$15

-

$200

$15

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

Laguna Lace Agate: Natural Laguna Lace Agate Chunk/Nodule – Unpolished This natural Laguna Lace agate chunk showcases striking lace-like fortification banding in soft shades of lavender-gray, cream, white, reddish-bro

Sep 27, 2026

Laguna Lace Agate

Est.

$2,000

-

$2,500

$1,000

Bellerose, NY

A M Imperial Inc

9.01 Carats Natural Brazilian Pink Topaz Octagon Faceted Loose Gemstone, 95SA: This specimen is composed of natural topaz sourced from Brazilian mineral deposits, processed via professional faceted lapidary techniques with consistent glossy polishing applied to the entire crysta

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9.01 Carats Natural Brazilian Pink Topaz Octagon Faceted Loose Gemstone, 95SA

Est.

$20

-

$200

$20

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

7.58 Carats Natural Brazilian Pink Topaz Octagon Faceted Loose Gemstone, 89SA: This specimen is composed of natural topaz sourced from Brazilian mineral deposits, processed via professional faceted lapidary techniques with consistent glossy polishing applied to the entire crysta

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7.58 Carats Natural Brazilian Pink Topaz Octagon Faceted Loose Gemstone, 89SA

Est.

$15

-

$200

$15

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

14.80ct Natural Yellow Sapphire Oval Cabochon Loose Gemstone Parcel, 69YW: This parcel oval cabochon natural yellow sapphires with each stone measuring 9.6x7.9x3.1mm. The gemstones display soft pale yellow colouration with natural internal inclusions; stones are fissure fill

2026

14.80ct Natural Yellow Sapphire Oval Cabochon Loose Gemstone Parcel, 69YW

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

Trihead Banded Agate: Banded Agate Cave with Druzy & Botryoidal Formation – Unpolished This natural banded agate cave showcases beautiful gray, white, and brown concentric banding surrounding a sparkling druzy-filled cav

Sep 27, 2026

Trihead Banded Agate

Est.

$400

-

$500

$150

Bellerose, NY

A M Imperial Inc

5.98 Carats Natural Madagascar Yellow Sapphire Cabochon Loose Gemstone, 90XY: Formed of natural corundum sourced from Madagascar geological formations, this raw mineral material is shaped and polished into a smooth cabochon form via professional stone processing techniques. Nat

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5.98 Carats Natural Madagascar Yellow Sapphire Cabochon Loose Gemstone, 90XY

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

KARPINSKY ALEXANDER: (1847-1936): KARPINSKY ALEXANDER: (1847-1936) Russian geologist and mineralogist. T.L.S., A Karpinsky, with autograph insertions, to the recto of a printed postcard from the Comité Géologique de la Russi

Sep 24, 2026

KARPINSKY ALEXANDER: (1847-1936)

Est.

€400

-

€500

€400

Marbella, Malaga

International Autograph Auctions Europe S.L.

4.5

(63)

168.97ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 66YT: 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

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168.97ct Natural Tanzanian Ruby Zoisite Raw Rough Specimen Mineral Stone, 66YT

Est.

$15

-

$200

$15

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

Natural Burmese Type A Pale Lavender Jadeite Jade Beaded Necklace, 4WY: This necklace strand is fashioned from authentic untreated Burmese Type A jadeite material, each spherical bead holding soft pale lavender tonal hues naturally formed during the stone's geological dev

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Natural Burmese Type A Pale Lavender Jadeite Jade Beaded Necklace, 4WY

Est.

$35

-

$200

$35

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

Moonlight & Magic: An abstract composition of vertical creamy-white and pale-yellow pillar forms rising from a warm reddish-orange base, with a circular target-like motif at upper right. The earthy palette of rust, ochr

Sep 25, 2026

Moonlight & Magic

Est.

$100

-

$300

$100

Las Vegas, NV

Icon Fine Arts

4.5

(60)

1.27 Carats Natural Rich Magenta Red Garnet Oval Faceted Loose Gemstone, 46WW: This garnet originates from natural geological mineral deposits and undergoes precise faceting and high-gloss reflective polishing via professional lapidary craftsmanship. Minute pinpoint mineral spec

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1.27 Carats Natural Rich Magenta Red Garnet Oval Faceted Loose Gemstone, 46WW

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

Certified 2.18 ct Emerald Cut Natural Beryl from Swat, Pakistan – IGI Report: This captivating 2.18-carat emerald-cut gemstone originates from the renowned emerald mines of Swat, Pakistan, a region celebrated for producing emeralds of exceptional vibrancy and historical prestig

Sep 30, 2026

Certified 2.18 ct Emerald Cut Natural Beryl from Swat, Pakistan – IGI Report

Est.

$1,300

-

$1,800

$100

Linkoping, Ostergotland

Chan & Scott Auction House

4.5

(59)

Two Amazonite in Feldspar Matrix with Quartz Specimens: Ca. 1,000,000–1000 BCE. North America, ca. millions of years ago. Two large raw amazonite mineral specimens, featuring vivid blue-green crystals emerging from a feldspar matrix with areas of qua

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Two Amazonite in Feldspar Matrix with Quartz Specimens

$500

Louisville, CO

Artemis Fine Arts

4.7

(1.5k)

3.44 Carats Natural Swiss Blue Topaz Loose Gemstone, 8WP: This genuine natural swiss blue topaz displays consistent saturated blue coloration inherent to unprocessed natural mineral specimens. Formed through natural geological formation, the stone carries su

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3.44 Carats Natural Swiss Blue Topaz Loose Gemstone, 8WP

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(24)

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