Onyx

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4 Art Nouveau Sterling Brooches: 4 art nouveau sterling silver brooches. Seated woman, winged woman / Mercury, Gump's flower, signed H. Santa crossed swords brooch with carved onyx mask. Flower 3 1/8"L. 77.8 grams total.

2026

4 Art Nouveau Sterling Brooches

Willow Auction HouseLincoln Park, NJ

Black Onyx Cameo Set & More: Black onyx, Mother of pearl & Marcasite Cameo Necklace (18") and pierced earrings. Two brooches, 1.5 & 2". Ring size 6. Small pierced post earrings with black onyx. (14 dwt) (6x4x2)

2026

Black Onyx Cameo Set & More

Vintage AuctionsOttawa, OH

Marcasite, Mother of Pearl & Onyx 925: Marcasite & Mother of pearl necklace, 16" long. Marcasite pin, 1.5" x 1". Two rings, size 6. (14 dwt)

2026

Marcasite, Mother of Pearl & Onyx 925

Vintage AuctionsOttawa, OH

Malachite & Black Onyx 925 Necklace & Pin: Vintage sterling Malachite and Black Onyx necklace, 18" long. Vintage sterling malachite brooch is 1.5" wide. (9 dwt)

2026

Malachite & Black Onyx 925 Necklace & Pin

Vintage AuctionsOttawa, OH

7 Sterling Rings with Marcasite & Other Gems: Seven sterling rings with marcasite, blue topaz, garnet & black onyx. Sizes 6-9 (21 dwt) (6x4x2)

2026

7 Sterling Rings with Marcasite & Other Gems

Vintage AuctionsOttawa, OH

A Vitorian Brooch: Victorian period, black onyx, set with seed pearls and a central marquise-shaped lapis lazuli, length 45 mm.

2026

A Vitorian Brooch

Veilinghuis de JagerGoes, Zeeland

12.70 Ct Natural Orange Onyx Trillion Cut: Weight - 12.70 Ct / Dimensions - 18.10 x 17.90 x 7.10 mm / Shape - Trillion Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

12.70 Ct Natural Orange Onyx Trillion Cut

Gems AuctionBangkok, TH

14.07 Ct Natural Blue Onyx Round Cut: Weight - 14.07 Ct / Dimensions - 18.00 x 18.00 x 7.70 mm / Shape - Round Cut / Clarity - Transparent / Origin - Brazil / Treatment - None

2026

14.07 Ct Natural Blue Onyx Round Cut

Gems AuctionBangkok, TH

10.09 Ct Natural Blue Onyx Pear Cut: Weight - 10.09 Ct / Dimensions -16.00 x 16.00 x 7.60 mm / Shape - Pear Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

10.09 Ct Natural Blue Onyx Pear Cut

Gems AuctionBangkok, TH

11.12 Ct Natural Black Onyx Pear Cut: Weight - 11.12 Ct / Dimensions - 16.80 x 16.40 x 7.30 mm/ Shape - Pear Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

11.12 Ct Natural Black Onyx Pear Cut

Gems AuctionBangkok, TH

7.00 Ct Natural Black Onyx Pear Cut: Weight - 7.00 Ct / Dimensions - 16.30 x 12.10 x 4.40 mm / Shape - Pear Cut / Clarity - Opaque / Origin - Brazil / Treatment - None

2026

7.00 Ct Natural Black Onyx Pear Cut

Gems AuctionBangkok, TH

13.59 Ct Natural Orange Onyx Hexagon Cut: Weight - 13.59 Ct / Dimensions - 19.30 x 17.00 x 6.90 mm / Shape - HExagon Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

13.59 Ct Natural Orange Onyx Hexagon Cut

Gems AuctionBangkok, TH

15.46 Ct Natural Black Onyx Trillion Cut: Weight - 15.46 Ct / Dimensions - 18.70 x 18.70 x 8.50 mm/ Shape - Trillion Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

15.46 Ct Natural Black Onyx Trillion Cut

Gems AuctionBangkok, TH

13.01 Ct Natural Green Onyx Hexagon Cut: Weight - 13.01 Ct / Dimensions - 18.90 x 16.50 x 7.50 mm / Shape - Hexagon Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

13.01 Ct Natural Green Onyx Hexagon Cut

Gems AuctionBangkok, TH

12.16 Ct Natural Orange Onyx Pear Cut: Weight - 12.16 Ct / Dimensions - 16.90 x 16.80 x 8.10 mm / Shape - Pear Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

12.16 Ct Natural Orange Onyx Pear Cut

Gems AuctionBangkok, TH

12.87 Ct Natural Green Onyx Pear Cut: Weight - 12.87 Ct / Dimensions - 18.20 x 17.70 x 8.10 mm / Shape - Pear Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

12.87 Ct Natural Green Onyx Pear Cut

Gems AuctionBangkok, TH

14.24 Ct Natural Green Onyx Round Cut: Weight - 14.24 Ct / Dimensions - 17.60 x 17.60 x 8.70 mm / Shape - Round Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

14.24 Ct Natural Green Onyx Round Cut

Gems AuctionBangkok, TH

12.55 Ct Natural Green Onyx Trillion Cut: Weight - 12.55 Ct / Dimensions - 17.90 x 18.00 x 7.60 mm / Shape - Trillion Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

12.55 Ct Natural Green Onyx Trillion Cut

Gems AuctionBangkok, TH

14.58 Ct Natural Blue Onyx Trillion Cut: Weight - 14.58 Ct / Dimensions - 18.80 x 18.80 x 8.10 mm / Shape - Trillion Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

14.58 Ct Natural Blue Onyx Trillion Cut

Gems AuctionBangkok, TH

15.90 Ct Natural Black Onyx Hexagonal Cut: Weight - 15.90 Ct / Dimensions - 20.90 x 18.10 x 7.40 mm/ Shape - Hexa Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

15.90 Ct Natural Black Onyx Hexagonal Cut

Gems AuctionBangkok, TH

14.19 Ct Natural Black Onyx Pear Briolette Pair: Weight - 14.19 Ct / Dimensions - 11.30 x 8.00 mm / 2 Pc's / Shape - Pear Cut / Clarity - Opaque / Origin - Brazil / Comments - None

2026

14.19 Ct Natural Black Onyx Pear Briolette Pair

Gems AuctionBangkok, TH

39.00 Ct Natural Red Orange Onyx Round Cab: Weight - 39.00 Ct / Dimensions - 29.00 x 29.00 x 6.10 mm / Shape - Round Cab / Clarity - Opaque / Origin - Brazil / Comments - None

2026

39.00 Ct Natural Red Orange Onyx Round Cab

Gems AuctionBangkok, TH

36.41 Ct Natural Red Orange Onyx Oval Cab: Weight - 36.41 Ct / Dimensions - 38.00 x 20.70 x 6.10 mm / Shape - Oval Cab / Clarity - Opaque / Origin - Brazil / Comments - None

2026

36.41 Ct Natural Red Orange Onyx Oval Cab

Gems AuctionBangkok, TH

5.14 Ct Natural Black Onyx Pear Cut Pair: Weight - 5.14 Ct / Dimensions - 12.00 x 8.00 x 4.20 mm / 2 Pc's / Shape - Pear Cut / Clarity - Opaque / Origin - Brazil / Treatment - None

2026

5.14 Ct Natural Black Onyx Pear Cut Pair

Gems AuctionBangkok, TH

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24

Onyx Auctions

Wrought Iron Base Round Onyx Table, 29Hx57Dia

Vere Antichit Italia Inlaid Walnut Cabinet by Artitalia Group & Arte Brotto

Vintage Brass and Crystal 5-Light Chandelier, 31"H x 22"W

MJ Welch Auctioneers Multi-Estate Auction 148

MJ Welch Auctioneers & Appraisers

Starts on:

Dyersburg, TN, US

DIOR Gorgeous 18K White Gold Ring

David Webb Platinum 5.56ct Diamond Turquoise Ring

Roberto Coin 18K Yellow Gold 1.98ct Diamond Collar Necklace

$1 Start Luxury Brands Antique Jewelry

Eastern European Art Gallery Inc

Starts on:

Broomall, PA, US

3 days Left

HAND KNAPPED ARROWHEADS ROCK STONE LAPIDARY SPECIMEN

MIXED LOT ROCK STONE LAPIDARY SPECIMEN

GARNET AND PERIDOT ROCK STONE LAPIDARY SPECIMEN

TURQUOISE TREASURES Mineral Showcase B

Col. Christie Hatman Auctioneers

Starts on:

Thayer, MO, US

3 days Left

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