Results for “loose opal”

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Natural Multi Color Opal 1.45 Ct 5 Pcs Oval Cabochon 6.1x4.1 mm Unheated Ethiopia Loose Gemstones: Natural Multi Color Opal 1.45 Ct 5 Pcs Oval Cabochon 6.1x4.1 mm Unheated Ethiopia Loose Gemstones 1.45 Ct | Oval Cabochon | Unheated | Ethiopia | October Birthstone Up for auction is a lot of 5 natura

Oct 25, 2026

Natural Multi Color Opal 1.45 Ct 5 Pcs Oval Cabochon 6.1x4.1 mm Unheated Ethiopia Loose Gemstones

Est.

$20

-

$31

$1

Lake Charles, LA

Treasure of Gems & Jewelry

4.5

(272)

1.41 Carats Natural Ethiopian Welo Blue Fire Opal Pear Faceted Loose Gemstone, 82TS: This opal material is mined from the Welo deposits of Ethiopia and processed with professional faceted lapidary work with uniform polished facets across the gem surface. Natural subtle internal textur

Starts in 2 days

1.41 Carats Natural Ethiopian Welo Blue Fire Opal Pear Faceted Loose Gemstone, 82TS

Est.

$15

-

$200

$15

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

Natural Multi Color Opal 1.34 Ct 5 Pcs Oval Cabochon 6.1x4.2 mm Unheated Ethiopia Loose Gemstones: Natural Multi Color Opal 1.34 Ct 5 Pcs Oval Cabochon 6.1x4.2 mm Unheated Ethiopia Loose Gemstones 1.34 Ct | Oval Cabochon | Unheated | Ethiopia | October Birthstone Up for auction is a lot of 5 natura

Oct 25, 2026

Natural Multi Color Opal 1.34 Ct 5 Pcs Oval Cabochon 6.1x4.2 mm Unheated Ethiopia Loose Gemstones

Est.

$14

-

$22

$5

Lake Charles, LA

Treasure of Gems & Jewelry

4.5

(272)

Loose Pear-Shaped Natural Australian Opal 1.85CT: 31100039 Setting: None, Loose Gemstone Weight: 1.85CT Dimenstions: 14mmx 9.5mmx3.4mm Treatment: None. Natural, Earth-mined opal Geographic Origin: Possibly Coober Pedy This pear-shaped, polished

Oct 25, 2026

Loose Pear-Shaped Natural Australian Opal 1.85CT

Est.

$400

-

$500

$60

Vero Beach, FL

Bidfair Fine Jewelry

4.3

(2)

Natural Colour Multi Color Opal 0.53 Ct Oval Cabochon 7.4x5.7 mm Unheated Ethiopia Loose Gemstone: Natural Colour Multi Color Opal 0.53 Ct Oval Cabochon 7.4x5.7 mm Unheated Ethiopia Loose Gemstone 0.53 Ct | Oval Cabochon | Unheated | Ethiopia | October Birthstone Up for auction is a natural colour

Oct 25, 2026

Natural Colour Multi Color Opal 0.53 Ct Oval Cabochon 7.4x5.7 mm Unheated Ethiopia Loose Gemstone

Est.

$34

-

$54

$3

Lake Charles, LA

Treasure of Gems & Jewelry

4.5

(272)

Outstanding 18ct White Gold Black Opal And Diamond Ring: Outstanding 18ct White Gold Black Opal And Diamond Ring Mesmerising black opal with the most incredible flashed of blue and green! Weight: 5.88g Size: UK J, US 5.25, head of ring 18x15mm, height

Outstanding 18ct White Gold Black Opal And Diamond Ring

Est.

£1,700

-

£1,750

Starting Bid
£860

Gloucestershire

Banks Jewellery Auctions

4.4

(15)

Natural Multi Color Opal 1.04 Ct Oval Cabochon 8.5x6.6 mm Unheated Ethiopia Loose Gemstone Gift: Natural Multi Color Opal 1.04 Ct Oval Cabochon 8.5x6.6 mm Unheated Ethiopia Loose Gemstone Gift 1.04 Ct | Oval Cabochon | Unheated | Ethiopia | October Birthstone Up for auction is a natural multi col

Oct 25, 2026

Natural Multi Color Opal 1.04 Ct Oval Cabochon 8.5x6.6 mm Unheated Ethiopia Loose Gemstone Gift

Est.

$35

-

$55

$8

Lake Charles, LA

Treasure of Gems & Jewelry

4.5

(272)

2.50ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 71TG: 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 11.8x9.3x5.2mm. The black smoke treatment de

Starts in 2 days

2.50ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 71TG

Est.

$25

-

$200

$25

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

4.48ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 26TG: Solid opal cabochon mined from Ethiopia's Welo opal deposits, polished into a smooth elongated oval dome with high reflective gloss. The translucent pale milky base hosts broad shifting play-of-color

Starts in 2 days

4.48ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 26TG

Est.

$25

-

$200

$25

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

2.50ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 73TG: 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 12.1x8.5x4.7mm. The black smoke treatment de

Starts in 2 days

2.50ct Natural Ethiopian Welo Black Smoked Opal Cabochon Loose Gemstone, 73TG

Est.

$25

-

$200

$25

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

3.33ct Natural Ethiopian Welo Orange Fire Opal Cabochon Loose Gemstone, 91TH: This opal is sourced from Ethiopian Welo natural opal deposits and shaped into a smooth polished cabochon form with refined lapidary finishing work. Bright warm pink base accompanied by vivid internal

Starts in 2 days

3.33ct Natural Ethiopian Welo Orange Fire Opal Cabochon Loose Gemstone, 91TH

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

5.75ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 22TG: Solid opal cabochon mined from Ethiopia's Welo opal deposits, polished to a sleek elongated oval domed cut with uniform high-gloss surface finish. The pale translucent milky base features scattered pa

Starts in 2 days

5.75ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 22TG

Est.

$35

-

$200

$35

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

4.42ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 33TG: Solid opal cabochon mined from Ethiopia's Welo opal deposits, polished into a smooth elongated oval dome with high reflective gloss. The translucent pale milky base hosts broad shifting play-of-color

Starts in 2 days

4.42ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 33TG

Est.

$25

-

$200

$25

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

4.62ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 37TG: Solid opal cabochon mined from Ethiopia's Welo opal deposits, polished into a smooth elongated oval dome with high reflective gloss. The translucent pale milky base hosts broad shifting play-of-color

Starts in 2 days

4.62ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 37TG

Est.

$25

-

$200

$25

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

1.70 Carats Natural Ethiopian Welo Pink Fire Opal Oval Faceted Loose Gemstone, 73XX: This opal is sourced from the Welo mining region of Ethiopia and crafted into faceted form via professional lapidary cutting with smooth polished facets across the exterior surface. Subtle natural int

Starts in 2 days

1.70 Carats Natural Ethiopian Welo Pink Fire Opal Oval Faceted Loose Gemstone, 73XX

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

Natural Multi Color White Opal 3.33 Ct Trilliant 10.6x10.5 mm Unheated Mexico Loose Gemstone Gift: Natural Multi Color White Opal 3.33 Ct Trilliant 10.6x10.5 mm Unheated Mexico Loose Gemstone Gift 3.33 Ct | Trilliant | Unheated | Mexico | October Birthstone Up for auction is a natural multi color w

Nov 1, 2026

Natural Multi Color White Opal 3.33 Ct Trilliant 10.6x10.5 mm Unheated Mexico Loose Gemstone Gift

Est.

$23

-

$36

$4

Lake Charles, LA

Treasure of Gems & Jewelry

4.5

(272)

10.54ct Natural Ethiopian Welo Solid Opal Pear Cabochon Loose Gemstone, 19TG: Solid opal cabochon sourced from Ethiopia's Welo opal mining fields, polished into a wide rounded pear domed cut with flawless high-gloss reflective finish. The translucent milky base features strikin

Starts in 2 days

10.54ct Natural Ethiopian Welo Solid Opal Pear Cabochon Loose Gemstone, 19TG

Est.

$75

-

$200

$75

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

3.48ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 35TG: Solid opal cabochon mined from Ethiopia's Welo opal deposits, polished into a smooth elongated oval dome with high reflective gloss. The translucent pale milky base hosts broad shifting play-of-color

Starts in 2 days

3.48ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 35TG

Est.

$20

-

$200

$20

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

3.88ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 28TG: Solid opal cabochon mined from Ethiopia's Welo opal deposits, polished into a smooth elongated oval dome with high reflective gloss. The translucent pale milky base hosts broad shifting play-of-color

Starts in 2 days

3.88ct Natural Ethiopian Welo Solid Opal Oval Cabochon Loose Gemstone, 28TG

Est.

$20

-

$200

$20

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

7.76ct Natural Ethiopian Welo Solid Opal Pear Cabochon Loose Gemstone, 20TG: Solid opal cabochon mined from Ethiopia's Welo opal deposits, fashioned into an elongated slender pear teardrop dome with a smooth high-gloss polish. The translucent milky host matrix showcases promin

Starts in 2 days

7.76ct Natural Ethiopian Welo Solid Opal Pear Cabochon Loose Gemstone, 20TG

Est.

$45

-

$200

$45

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

Loose Gemstones & Organic Materials: A collection of loose gemstones and organic materials, comprising approximately 50 units. The assortment is presented in individual round clear plastic protective cases, housed within two black velvet

Nov 2, 2026

Loose Gemstones & Organic Materials

Est.

$10

-

$500

$10

Dundee, OH

Atlee Raber Auctions

4.6

(621)

3.34ct Natural Ethiopian Welo Orange Fire Opal Cabochon Loose Gemstone, 94TH: This opal is sourced from Ethiopian Welo natural opal deposits and shaped into a smooth polished cabochon form with refined lapidary finishing work. Bright warm pink base accompanied by vivid internal

Starts in 2 days

3.34ct Natural Ethiopian Welo Orange Fire Opal Cabochon Loose Gemstone, 94TH

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

$7.28ct Natural Multicolor Fire Ethiopian Welo Solid Opal Cabochon Loose Gemstone, 15TG: Formed from natural silica deposits within Ethiopian mineral veins, this solid opal cabochon is expertly polished to a smooth domed surface that fully showcases inherent light refraction properties. T$

Starts in 2 days

7.28ct Natural Multicolor Fire Ethiopian Welo Solid Opal Cabochon Loose Gemstone, 15TG

Est.

$45

-

$200

$45

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

1.48 Carats Natural Ethiopian Welo Opal Oval Cabochon Loose Gemstone, 40XV: Natural Ethiopian Welo opal polished oval cabochon loose gemstone, luminous translucent milky white base stone with vivid multi-hued play-of-color featuring bright emerald green, lime yellow, soft blu

Starts in 2 days

1.48 Carats Natural Ethiopian Welo Opal Oval Cabochon Loose Gemstone, 40XV

Est.

$10

-

$200

$10

Sathorn, Bangkok

Lazo Heritage

4.4

(26)

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