Opal

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2.27ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 55FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 12x9x4mm. The black smoke treatment deepens

2026

2.27ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 55FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

2.40ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 13FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 10x9x5mm. The black smoke treatment deepens

2026

2.40ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 13FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

47.77ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 88AY: 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

2026

47.77ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 88AY

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

1.91ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 38FL: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 10.2x8x5.3mm. The black smoke treatment deep

2026

1.91ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 38FL

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

65.38ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 47AY: 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

2026

65.38ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 47AY

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

2.82ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 72AK: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 12.3x8.8x5mm. The black smoke treatment deep

2026

2.82ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 72AK

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

1.32ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 9FL: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 11x8.9x3mm. The black smoke treatment deepen

2026

1.32ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 9FL

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

2.28ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 36FL: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 10.9x8.8x5.3mm. The black smoke treatment de

2026

2.28ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 36FL

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

3.14ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 41BY: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 12x9x6mm. The black smoke treatment deepens

2026

3.14ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 41BY

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

2.28ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 32FL: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 11.1x8.6x5.5mm. The black smoke treatment de

2026

2.28ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 32FL

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

2.35ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 22FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 11x8x5mm. The black smoke treatment deepens

2026

2.35ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 22FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

2.98ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 42FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 11x9x5mm. The black smoke treatment deepens

2026

2.98ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 42FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

1.93ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 4FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 11x8x4mm. The black smoke treatment deepens

2026

1.93ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 4FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

3.00ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 56BY: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 12x9x5mm. The black smoke treatment deepens

2026

3.00ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 56BY

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

1.80ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 75FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 11x8x4mm. The black smoke treatment deepens

2026

1.80ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 75FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

4.14ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 73BY: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 13x12x6mm. The black smoke treatment deepens

2026

4.14ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 73BY

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

2.07ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 3FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 10x7x5mm. The black smoke treatment deepens

2026

2.07ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 3FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

1.36ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 36FX: This fully polished Ethiopian Welo opal features a dark smoked base with vivid, sweeping play-of-color shifting across its glossy dome surface, measured at 11x8x3mm. The black smoke treatment deepens

2026

1.36ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 36FX

Sathorn, Bangkok

ThousandPlanet

4.5

(318)

Victorian 14K stick pin w/ opal, diamonds, & green stones: Beautiful Victorian 14K stick pin (2.6"L) with center opal (0.35"x0.25"0, accented with 20 old cut diamonds, and 20 green stones (possible garnet), wt. 3.2gm

2026

Victorian 14K stick pin w/ opal, diamonds, & green stones

Anaheim, CA

International Auction Gallery

4.6

(870)

SOLD

An opal and diamond pendant White and yellow metal: An opal and diamond pendant White and yellow metal Of pierced design, set with five oval-cut opal cabochons, accented by rose-cut diamonds, to milgrain decorations, pendant stamped 925, bail stamped 5

2026

An opal and diamond pendant White and yellow metal

London

Chiswick Auctions

4.4

(104)

14KT YELLOW GOLD PINK OPAL HEART-SHAPED PENDANT WITH EMERALD AND DIAMONDS: 14KT. GOLD WT. APPROX. 1.80 GRAMDIAMOND WT. APPROX. 0.08 CARATPINK OPAL AND EMERALD WT. APPROX. 4.64 CARATSIZE: 24 MM X 18 MM

2026

14KT YELLOW GOLD PINK OPAL HEART-SHAPED PENDANT WITH EMERALD AND DIAMONDS

Boca Raton, FL

Platinum Auction Group

4.4

(78)

America Sterling Silver Opal Feather Ring.: This is a America Sterling Silver Opal Feather Ring. Ring Size: 8.50.

2026

America Sterling Silver Opal Feather Ring.

Los Angeles, CA

AWS Auctioneers

4.5

(568)

Native America Navajo Sterling Silver Opal & Cubic Zirconia Ring By Virginia.: This is a Native America Navajo Sterling Silver Opal & Cubic Zirconia Ring By Virginia. Stamp Virginia. Ring Size: 9.00.

2026

Native America Navajo Sterling Silver Opal & Cubic Zirconia Ring By Virginia.

Los Angeles, CA

AWS Auctioneers

4.5

(568)

14K Gold 20.03cts Opal & 11.84cts Diamond Necklace: Retail: $91,403*****14K Gold Opal & Diamond Necklace*****Metal: 14K White Gold/ Total Wt.: none / Country Made US// Main Stone: Opal / Carat Total Wt.: 20.03cts / Treatment: none / Color: none / Cut:

2026

14K Gold 20.03cts Opal & 11.84cts Diamond Necklace

Woodland Hills, CA

Prestige Auction Galleries

4.4

(659)

View:

24

Opal Auctions

15.75Ct Honey Citrine Gemstone, Golden Quartz, Custom Jewelry 17X15X10 mm

0.40 Carats Fine Quality Natural Emerald - 7X4X3 mm

4.55 Carats Paired Emerald Cut Santa Maria Aquamarine Gemstones - 10X7X5 mm

Natural Loose Gemstones Starting at $50

Fantasy Jewelry

Starts on:

Muscat, Muscat, AE

1 day Left

Rocki Gorman Sterling Silver Multi-Strand Cross Necklace 179.75g

Turquoise Sterling Silver Concho Belt on New Leather 12 Conchos 313.25g

Robert Johnson Navajo Turquoise Cuff

SILVER, STONE & STORY

Kahu Paws Trading LLC

Starts on:

Santa Fe, NM, US

16 hrs Left

Large Rookwood plaque, Summer, Hurley, 1948, 12 by 14 inches.

Rookwood Vellum, Barn Swallows and Moon, Shirayamadani, 1907.

Rare Rookwood Aerial Blue mug with Polar Bear, Shirayamadani, 1896.

Fall 2026: Rookwood + Art Pottery

Starts on:

Cincinnati, OH, US

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