Results for “opal 18k”

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Brooke Gregson 18K Gold Three Opal Silk Cord Bracelet: Brooke Gregson bracelet featuring three oval opal cabochons set in 18K gold bezels, connected by woven silk cord and gold chain. Marked 18K. Designer signed. Measures 6.5 inches in length. Weighs 6 gr

May 24, 2026

Brooke Gregson 18K Gold Three Opal Silk Cord Bracelet

Est. $400-$500

$200

Hughes AuctionsSunland, CA

18K Gold Boulder Opal Pendant Necklace: 18K yellow gold necklace featuring a teardrop-shaped boulder opal pendant. Chain is 16 inches long, pendant is 1/2 inch wide. Total weight: 2.2 grams.

May 24, 2026

18K Gold Boulder Opal Pendant Necklace

Est. $300-$500

$150

Hughes AuctionsSunland, CA

18k Gold 41.00ct Opal 2.55ct Diamond Necklace: Retail: $33,700.00 ****** 18k Gold 41.00ct Opal 2.55ct Diamond Necklace ****** Metal: 18k Solid White Gold / Size: 17 / Total Item Weight: 45.0 grams / Country Made: United States / / Main Stone: Opal

7 days Left

18k Gold 41.00ct Opal 2.55ct Diamond Necklace

Est. $16,513-$25,275

$50

Prestige Auction GalleriesWoodland Hills, CA

18K Yellow Gold Opal and Diamond Ring: 18K Yellow Gold Opal and Diamond Ring, featuring one prong set oval cabochon opal weighing approx. 14.00 carats, surrounded by 26 prong set round brilliant cut diamonds weighing a total of approx. 1.2

2 days Left

18K Yellow Gold Opal and Diamond Ring

Est. $4,000-$6,000

$2,500

Auctions at ShowplaceAstoria, NY

Fire Opal, Diamond, 18k Yellow Gold Ring: Fire Opal, Diamond, 18k Yellow Gold Ring. Featuring one oval-cut fire opal weighing approximately 5.65 cts., accented by full-cut diamonds weighing a total of approximately 0.45 cttw., set in an 18k y

3 days Left

Fire Opal, Diamond, 18k Yellow Gold Ring

Est. $600-$800

$300

Michaan's AuctionsAlameda, CA

An Opal & Diamond Ring in 18K: 18K yellow gold ring featuring a large oval opal cabochon with pink, yellow, orange, green, and blue play-of-color measuring 17.3 x 12.1 mm prong set in the center of a Old European diamond partial be

2 days Left

An Opal & Diamond Ring in 18K

Est. $3,000-$5,000

$1,500

Alex CooperTowson, MD

18K White Gold Opal and Diamond Cocktail Ring: METAL: 18K White Gold; APPROXIMATE TOTAL DIAMOND WEIGHT: 2 ctw; GEMSTONES: Opal is approx. 17.90 mm x 14.10 mm, Opal is crazed; TESTED: 18K White Gold; CONDITION: Pre-owned, Fair; ITEM WEIGHT (GRAMS):

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18K White Gold Opal and Diamond Cocktail Ring

Est. $1,800-$2,500

$1,200

Hampton Estate AuctionNew York, NY

Estate 6.20ct Opal Diamond 18k Yellow Gold Wide Bracelet: Estate 6.20ct Opal Diamond 18k Yellow Gold Wide Bracelet This stunning estate bracelet is masterfully crafted from 18k yellow gold, showcasing a unique textured open branch-like design. The front half

2 days Left

Estate 6.20ct Opal Diamond 18k Yellow Gold Wide Bracelet

Est. $14,092-$18,319

$100

Mynt AuctionsNew York, NY

An Opal & Diamond Drop Pendant in 18K: 18K white gold pendant featuring an oval opal measuring 9.6 x 7.3 mm prong set in the center of a filigree shield with round diamonds bead set, suspending a pear shaped opal cabochon with green, blue,

2 days Left

An Opal & Diamond Drop Pendant in 18K

Est. $2,000-$4,000

$1,000

Alex CooperTowson, MD

18K Yellow Gold and Opal Ring: METAL: 18K Yellow Gold; GEMSTONES: Opal approx. 5.56 carats, Weight estimated by formula; STAMPED: 18K; CONDITION: Pre-owned, Very Good; ITEM WEIGHT (GRAMS): 5 g; MEASUREMENTS: Ring size 6 1/2

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18K Yellow Gold and Opal Ring

Est. $1,300-$1,700

$850

Hampton Estate AuctionNew York, NY

Diamond, Opal, 18k Yellow Gold 'Star' Pin Pendant: Diamond, Opal, 18k Yellow Gold 'Star' Pin Pendant Designed as a star, featuring ten oval and pear-shape opal cabochons, accented by six round brilliant-cut diamonds weighing a total of approximately 0

5 days Left

Diamond, Opal, 18k Yellow Gold 'Star' Pin Pendant

Est. $1,200-$1,400

$600

Fine Estate, Inc. San Rafael, CA

18K Gold Natural Opal Diamond Pendant: This pendant features 18K gold set with natural opal and diamonds. The main stone is 6.2 carats, showcasing a rich golden hue with a cool white glow. The thick gold setting ensures each diamond's mini

May 20, 2026

18K Gold Natural Opal Diamond Pendant

Est. £6,000-£12,000

£3,000

Hans AuctionSouth Croydon, Croydon

Modernist 18K Yellow Gold Boulder Opal and Diamond Pendant: A modernist 18 karat yellow gold pendant featuring a 2.93 carat natural triangular boulder opal with vibrant red, orange, green, and blue play-of-color. The asymmetrical design incorporates a ribbed g

21 hrs Left

Modernist 18K Yellow Gold Boulder Opal and Diamond Pendant

Est. $10-$100,000

$370

Gallery 63Atlanta, GA

18K Gold Natural Opal Diamond Pendant: This pendant features a meticulously set 18K gold with a 2.9-carat natural opal as the centerpiece, showcasing vibrant colors. The rich gold setting enhances its brilliance, while the finely set diamo

May 20, 2026

18K Gold Natural Opal Diamond Pendant

Est. £5,000-£10,000

£2,400

Hans AuctionSouth Croydon, Croydon

30.90ct Opal, 2.80ctw Diamond and 18K Statement Ring: 30.90ct Opal, 2.80ctw SI1-SI2/G-H Diamond and 18K White Gold Statement Ring - THIS ITEM WILL COME WITH A $20,000 INSURANCE VALUATION REPORT. A truly extraordinary and commanding piece, this spectacula

May 30, 2026

30.90ct Opal, 2.80ctw Diamond and 18K Statement Ring

Est. $19,000-$20,000

$2,400

GWS Auctions Inc.Maitland, FL

20.35ct Opal, 4.00ctw Diamond and 18K 16" Necklace: 20.35ct Opal, 4.00ctw VS1-SI1/G-H Diamond and 18K White Gold 16" Pendant Vine Necklace - THIS ITEM WILL COME WITH A $28,000 INSURANCE VALUATION REPORT. A spectacular statement necklace centered around

May 30, 2026

20.35ct Opal, 4.00ctw Diamond and 18K 16" Necklace

Est. $27,000-$28,000

$3,500

GWS Auctions Inc.Maitland, FL

Sterling Silver 18k Gold & Carved Opal Native American Inspired Allligator Belt Buckle & Tip: JW Cooper Sterling & 18k gold belt buckle with a carved piece of opal into the shape of an indian head in a headdress. Buckle (40) measures 3.25 inches wide x 2.25 inches high. Belt without buckle mea

May 31, 2026

Sterling Silver 18k Gold & Carved Opal Native American Inspired Allligator Belt Buckle & Tip

Est. $600-$800

$60

Heritage Gallery AuctionsPatchogue, NY

AN 18K WHITE GOLD, BOULDER OPAL AND DIAMOND ENHANCER/PENDANT: AN 18K WHITE GOLD, BOULDER OPAL AND DIAMOND ENHANCER/PENDANT Centering a triangular-shaped cabochon boulder opal, in a surround of round brilliant-cut diamonds; estimated opal weight 79.10 carats; est

7 days Left

AN 18K WHITE GOLD, BOULDER OPAL AND DIAMOND ENHANCER/PENDANT

Est. $6,000-$8,000

$6,000

BonhamsLos Angeles, CA

12.15ct Opal, 0.85ctw VS2-SI1/G-H Diamond and 18K Ring: 12.15ct Opal, 0.85ctw VS2-SI1/G-H Diamond and 18K White Gold Ring - THIS ITEM WILL COME WITH AN $8,000 INSURANCE VALUATION REPORT. A captivating expression of classic elegance and extraordinary gemsto

May 30, 2026

12.15ct Opal, 0.85ctw VS2-SI1/G-H Diamond and 18K Ring

Est. $7,500-$8,000

$900

GWS Auctions Inc.Maitland, FL

15.80ctw Opal, 12.50ctw Diamond and 18K 3.10" Earrings: 15.80ctw Opal, 12.50ctw VS1-SI1/G-H Diamond and 18K White Gold 3.10" Statement Earrings - THIS ITEM WILL COME WITH A $40,000 INSURANCE VALUATION REPORT. A breathtaking display of extraordinary scale a

May 30, 2026

15.80ctw Opal, 12.50ctw Diamond and 18K 3.10" Earrings

Est. $39,000-$40,000

$5,000

GWS Auctions Inc.Maitland, FL

5.60ctw Opal, 0.80ctw Diamond and 18K Earrings: 5.60ctw Opal, 0.80ctw VS1-SI1/G-H Diamond and 18K White Gold 0.75" Teardrop Earrings - THIS ITEM WILL COME WITH A $7,500 INSURANCE VALUATION REPORT. A captivating blend of ethereal beauty and refined

May 30, 2026

5.60ctw Opal, 0.80ctw Diamond and 18K Earrings

Est. $7,000-$7,500

$900

GWS Auctions Inc.Maitland, FL

Vintage 18k Yellow Gold Brooch with Opal and Ruby Floral Design: Vintage 18k Yellow Gold Brooch with Opal and Ruby Floral Design This vintage brooch features a floral motif adorned with opal and ruby gemstones, finely set in 18k yellow gold. The piece showcases a b

16 hrs Left

Vintage 18k Yellow Gold Brooch with Opal and Ruby Floral Design

Est. $4,160-$5,408

$100

Mynt AuctionsNew York, NY

12.00ct Opal, 0.90ctw Diamond and 18K White Gold Ring: 12.00ct Opal, 0.90ctw VS2-SI1/G-H Diamond and 18K White Gold Ring - THIS ITEM WILL COME WITH AN $8,500 INSURANCE VALUATION REPORT. Showcasing mesmerizing color and refined elegance, this exceptional r

May 30, 2026

12.00ct Opal, 0.90ctw Diamond and 18K White Gold Ring

Est. $8,000-$8,500

$1,000

GWS Auctions Inc.Maitland, FL

18K Yellow Gold Cabochon Black Opal and Round Diamond Ring, Size 6.75: 18K Yellow Gold Cabochon Black Opal and Round Diamond Ring, Size 6.75, Consisting of One Cabochon Black Opal Weighing 8.00 Carats and Seventy-Two (72) Natural Round Diamonds Weighing 1.00 Carat.

May 30, 2026

18K Yellow Gold Cabochon Black Opal and Round Diamond Ring, Size 6.75

Est. $7,000-$9,000

$3,400

Northgate Gallery, Inc.Hixson, TN

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