Opal

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2.65 Carats Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 51AG: This delicate black smoked opal from Ethiopian Welo showcases soft swirling bursts of blush pink, fiery red, mint green and faint lavender play of color floating across a milky translucent base, measu

2026

2.65 Carats Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 51AG

ThousandPlanetThung Wat Don, Sathorn, Bangkok

$53.25ct Natural Australian Queensland Matrix Boulder Opal Large Freeform Teardrop Cabochon, 48FB: Hand polished oversized organic freeform teardrop cabochon of natural Queensland matrix boulder opal, featuring warm speckled caramel ironstone matrix densely threaded with intricate fractal opal vein$

2026

53.25ct Natural Australian Queensland Matrix Boulder Opal Large Freeform Teardrop Cabochon, 48FB

ThousandPlanetThung Wat Don, Sathorn, Bangkok

3.47 Carats Natural Ethiopian Welo Tangerine Orange Opal Cabochon Loose Gemstone, 57AG: This glossy polished opal boasts a rich glowing tangerine orange base interlaced with streaks of vivid lime yellow, electric green and faint magenta shifting play of color, measured at 15x12.2x3.6mm,

2026

3.47 Carats Natural Ethiopian Welo Tangerine Orange Opal Cabochon Loose Gemstone, 57AG

ThousandPlanetThung Wat Don, Sathorn, Bangkok

3.14 Carats Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 62AG: This delicate black smoked opal from Ethiopian Welo showcases soft swirling bursts of blush pink, fiery red, mint green and faint lavender play of color floating across a milky translucent base, measu

2026

3.14 Carats Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 62AG

ThousandPlanetThung Wat Don, Sathorn, Bangkok

67.53ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 98AX: 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

67.53ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 98AX

ThousandPlanetThung Wat Don, Sathorn, Bangkok

79.16ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 95AX: 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

79.16ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 95AX

ThousandPlanetThung Wat Don, Sathorn, Bangkok

83.20ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 84AX: 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

83.20ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 84AX

ThousandPlanetThung Wat Don, Sathorn, Bangkok

48.21ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 36AY: 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

48.21ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 36AY

ThousandPlanetThung Wat Don, Sathorn, Bangkok

65.20ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 31AY: 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

65.20ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 31AY

ThousandPlanetThung Wat Don, Sathorn, Bangkok

1.68ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 58AK: 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 11x7.5x4.6mm. The black smoke treatment deep

2026

1.68ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 58AK

ThousandPlanetThung Wat Don, Sathorn, Bangkok

2.44ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 64AK: 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 11.8x8.6x5mm. The black smoke treatment deep

2026

2.44ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 64AK

ThousandPlanetThung Wat Don, Sathorn, Bangkok

2.86ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 74AK: 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 11.3x8.5x5.6mm. The black smoke treatment de

2026

2.86ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 74AK

ThousandPlanetThung Wat Don, Sathorn, Bangkok

2.20 Carats Natural Ethiopian Welo Pastel Blush Pink Opal Cabochon Loose Gemstone, 53AG: This smoothly polished opal features a soft pale blush pink base scattered with shifting patches of coral red, lime green and warm golden yellow play of color, measured at 11.1x8.7x4.7mm, its gentle r

2026

2.20 Carats Natural Ethiopian Welo Pastel Blush Pink Opal Cabochon Loose Gemstone, 53AG

ThousandPlanetThung Wat Don, Sathorn, Bangkok

3.94 Carats Natural Ethiopian Welo Violet Blue Opal Cabochon Loose Gemstone, 60AG: This striking opal carries a saturated deep violet and electric blue iridescent glow across its smooth polished dome, measured at 13.4x9.6x6.1mm, the uniform rich cool-toned flash delivers bold eye-ca

2026

3.94 Carats Natural Ethiopian Welo Violet Blue Opal Cabochon Loose Gemstone, 60AG

ThousandPlanetThung Wat Don, Sathorn, Bangkok

3.61 Carats Natural Ethiopian Welo Tangerine Orange Opal Cabochon Loose Gemstone, 48AG: This glossy polished opal boasts a rich glowing tangerine orange base interlaced with streaks of vivid lime yellow, electric green and faint magenta shifting play of color, measured at 12.2x10x6.6mm,

2026

3.61 Carats Natural Ethiopian Welo Tangerine Orange Opal Cabochon Loose Gemstone, 48AG

ThousandPlanetThung Wat Don, Sathorn, Bangkok

4.74 Cts Natural Multicolor Opal Pear Necklace Set: Weight - 4.74 Ct / Dimensions - 8.00 x 6.00 - 8.20 x 6.20 mm / 7 Pc's / Shape - Pear Cut / Color - Multicolor / Clarity - Translucent / Origin - Ethiopia / Treatment - None

2026

4.74 Cts Natural Multicolor Opal Pear Necklace Set

Gems AuctionBangkok, TH

10.50 Ct Natural Opal Oval Cab: Weight - 10.50 Ct / Size - 16.30 x 11.00 x 8.40 mm / Shape - Oval Cab / Clarity - Opaque / Origin - Brazil / Treatment - None

2026

10.50 Ct Natural Opal Oval Cab

Gems AuctionBangkok, TH

3.20 Ct Natural Pink Fire Opal Round Beads: Weight - 3.20 Ct / Dimensions - 3.60 - 3.90 mm / 18 Pc's / Shape - Round Beads / Color - Pink / Clarity - Translucent / Origin - Ethiopia / Treatment - Color Heated

2026

3.20 Ct Natural Pink Fire Opal Round Beads

Gems AuctionBangkok, TH

1.65 Ct Natural Mexican Opal Pear Drop: Weight - 1.65 Ct / Dimensions - 8.30 x 6.80 x 6.80 mm / Shape - Pear Drop / Color - Orange / Clarity - Translucent / Origin - Mexico / Comments - None

2026

1.65 Ct Natural Mexican Opal Pear Drop

Gems AuctionBangkok, TH

Stunning Ornate Vintage Sterling Silver Necklace, Marcasite & Opal Pendant: Very good vintage condition with minor patina according to age. Pendant Measures approx. 3/4" long and 1/2" wide and weighs ca. 3.1 grams. Necklace is 18" long and 1/16" wide. Marked Sterling Silver.

2026

Stunning Ornate Vintage Sterling Silver Necklace, Marcasite & Opal Pendant

Pandora AuctionsMiami, FL

3.70 Ct Natural Welo Opal Rough Cab: Weight - 3.70 Ct / Size - 11.00 x 11.00 x 6.00 mm / Shape - Rough Cab / Color - Multicolor / Clarity - Translucent / Origin - Ethiopia / Treatment - None

2026

3.70 Ct Natural Welo Opal Rough Cab

Gems AuctionBangkok, TH

6.47 Ct Natural Pink Opal Oval Cab Pair: weight - 6.47 Ct / Size - 12.00 x 10.00 x 4.00 mm / 2 Pc's / Shape - Excellent Oval Cab / Origin - Australia / Treatment - None

2026

6.47 Ct Natural Pink Opal Oval Cab Pair

Gems AuctionBangkok, TH

31.80 Ct Natural Orange Fire Opal Round Beads Bracelet: Weight - 31.80 Ct / Dimensions - 5.10 - 8.70 mm / 50 Pc's / 7 " inches / Shape - Round Beads / Color - Transparent / Clarity - Transparent / Origin - Ethiopia / Treatment - Color Heated

2026

31.80 Ct Natural Orange Fire Opal Round Beads Bracelet

Gems AuctionBangkok, TH

19.42 Ct Natural Multicolor Welo Fire Opal 5" Round Faceted Beads: Weight - 19.42 Ct / Dimensions - 4.80 - 5.30 mm / 51 Pc's / 5" Inches / Shape - Round Beads / Transparency - Transparent / Origin - Ethiopia / Treatment - None

2026

19.42 Ct Natural Multicolor Welo Fire Opal 5" Round Faceted Beads

Gems AuctionBangkok, TH

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Opal Auctions

1.97Ct Welo Black Faceted Opal Polished - Ethiopian Opal , 445E

29.90Ct Moss Agate Cabochon - Polished - 31x21mm Approx , 320E

Australian Lightning Ridge Crystal Black Opal Rough Chip Jar (Good For Display), 344B

The Aurora Treasury Gems & Jewels #3

Ksmith Heritage Auctioneers

Starts on:

Jelutong, Penang, MY

3 days Left

6.40 Cts Natural amethyst Gemstone - 12X10.5X8 mm

1.25 Carats Deep Blue Natural Aquamarine Loose Gemstone - 9X6X4 mm

Baby Pink Top quality Natural Kunzite loose Gemstone - 3.25 Carats - 9X8.5X6 mm

NO RESERVE Loose Gemstones

Fantasy Jewelry

Starts on:

Muscat, Muscat, AE

2 days Left

Impressive Mid Century Viking Epic Stockholm Smoke Pine Gray Lotus Wayne Husted Art Glass Vase

GIVENCHY Vintage Designer Matte Silver G Cutout Necklace, Bracelet & Pierced Earrings Ensemble

Vintage Jewelry, Early Christmas & Unusual

Atlee Raber Auctions

Starts on:

Dundee, OH, US

4 days Left

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