About Nikka Jewelry
Since 1979, we've specialized in buying and selling diamonds, jewelry, coins, numismatics, gold, and precious metals. We serve both investors and private collectors, offering a range of unique and high-quality items like vintage jewelry, designer pieces, estate collections, fine jewelry, exquisite watches, and rare coins. With our extensive experience in the industry, we bring a wealth of knowledge to the jewelry and watch markets. Our focus is on providing top-notch jewelry and watches at great prices while guaranteeing authenticity for every item we sell.
Established in 19791stDibs seller since 2026
Featured Pieces
18K White Gold Cocktail Ring Natural Diamond Baguette/ Round 2.9 CTW
Located in Los Angeles, CA
Band Width is 4.60 MM.
The height on top is 5.15 MM.
The top part width and length are 25.5 mm by 20.2 mm.
Ring Size: 6.75
Metal: 18 Karat White Gold
Ring Weight: 9.6 Grams
Diamond: ...
Category
21st Century and Contemporary American Modern Cocktail Rings
Materials
Diamond, White Gold, 18k Gold
21.35 Carat TW Natural Diamond Round Cut Tennis Bracelet 18K White Gold 7 Inches
Located in Los Angeles, CA
Metal: 18 Karat White Gold
Weight: 20.70 Grams of Solid 18 karat white gold
Diamond: Approximately 21.35 Carat Total Weight of Colorless Round Diamonds
Clarity: SI, ALL STONES ARE E...
Category
21st Century and Contemporary American Modern Tennis Bracelets
Materials
Diamond, White Gold, 18k Gold
HUBERT GIA Cert 15.4mm Golden South Sea Pearl Diamond 18K Gold Cocktail Ring
Located in Los Angeles, CA
Hubert Golden South Sea Pearl Diamond Cocktail Ring in 18K Yellow Gold. This designer Hubert ring features a large natural golden South Sea pearl accented by round brilliant diamonds...
Category
2010s American Art Deco Engagement Rings
Materials
Diamond, South Sea Pearl, Gold, Yellow Gold, 18k Gold
Vintage Diamond & Enamel Tiger Ring, 21.2 Grams 18K Gold David Webb Style
Located in Los Angeles, CA
This impressive tiger ring displays the bold sculptural design, rich enamel work, and diamond detailing associated with David Webb. No maker’s mark is presently visible, possibly due...
Category
20th Century Art Deco Cocktail Rings
Materials
Diamond, 18k Gold, Enamel
Hermès Kelly Natural Diamond 0.36 Carat 18 Karat Rose Gold Bracelet
By Hermès
Located in Los Angeles, CA
A celebrated icon of the House of Hermès, this Kelly bracelet is masterfully crafted in solid 18 karat rose gold and accented with brilliant natural diamonds. Inspired by the legenda...
Category
21st Century and Contemporary Art Deco Bangles
Materials
Diamond, Rose Gold, 18k Gold
Cartier 18 Karat Rose Gold Juste Un Clou Bracelet Classic Size 19 Full Set Mint
By Cartier
Located in Los Angeles, CA
Details
Brand: Cartier
Collection: Juste un Clou
Model: Classic
Metal: Solid 18 Karat Rose Gold (750/1000)
Bracelet Size: 19
Width: Approximately 3.5 mm
Made by: Cartier
Includes:
O...
Category
21st Century and Contemporary Art Deco Bangles
Materials
Rose Gold
Mimi So GIA Certified 7.1 CT Natural Colombian Emerald 18K White Gold Ring
By Mimi So
Located in Los Angeles, CA
Band Width is 5.75 MM.
The height on top is 9.96 MM.
Ring Length on finger is Approximately 18 MM.
Ring Width on finger is Approximately 16.7 MM.
Ring Size: 6.5
Metal: 18 Karat White...
Category
21st Century and Contemporary Modern Cocktail Rings
Materials
Emerald, White Gold, 18k Gold
Natural Diamond 15.75 Carat Cuban Link Necklace 10 Karat Yellow Gold 19 Inches
Located in Los Angeles, CA
Metal: 10 Karat Yellow Gold Cuban link
Weight: 96.7 Grams of solid 10 Karat Yellow Gold
Diamond: Approximately 15.75 Carat Total Weight of Natural Round Cut Diamonds
Clarity: VS/SI, ...
Category
21st Century and Contemporary American Modern Chain Necklaces
Materials
Diamond, Yellow Gold, 10k Gold
Natural Diamond 0.95 CT Princess Cut Half Eternity Band 14 Karat White Gold Ring
Located in Los Angeles, CA
Bandwidth is 2.3 MM.
The height on top is 3.15 MM.
Ring Size: 7.5
Metal: 14 Karat White Gold
Ring Weight: 3.1 Grams
Diamond: Approximately 0.95 Carat Total Weight of Natural Round C...
Category
21st Century and Contemporary Art Deco Band Rings
Materials
Diamond, White Gold
0.32 CT Natural Diamond Cross Pendant W/ 18" chain 14K Rose Gold Round Cut
Located in Los Angeles, CA
Pendant Length (Top to Bottom): Approximately 4 CM
Pendant Width (Left to Right): Approximately 2.4 CM
Bail Length is 5.6 MM.
Bail Width is 2.75 MM.
Weight: 5.8 Grams
Metal: 14 Kar...
Category
Antique 19th Century American Art Deco Pendant Necklaces
Materials
Diamond, Rose Gold
Natural Chocolate & White Diamond 10K Yellow Gold Men's Pinky Ring 0.75 CT
Located in Los Angeles, CA
Bandwidth is 4.1 MM.
The height on top is 3.55 MM.
Length of ring on finger (Top to Bottom) is 10.14 MM.
Ring Size: 10.25
Metal: 10 Karat Yellow Gold
Ring Weight: 6.3 Grams
Center G...
Category
Antique 19th Century Unknown Art Deco Cocktail Rings
Materials
White Diamond, Brown Diamond, Yellow Gold
Natural Diamond Halo Engagement Ring 14K Yellow Gold 2.1 CT Men's Pinky Ring
Located in Los Angeles, CA
The ring is a size 11.5 and will surely make a statement on any finger.
Metal: 11.3 grams of Solid 14 Karat Yellow Gold
Diamond: Approximately 2.1 Carat Total Weight of Natural Diamo...
Category
Antique 19th Century Art Deco Cocktail Rings
Materials
Diamond, Yellow Gold
