Chevalier ring, 1940s, in 18 kt. yellow gold with platinum trim.

Chevalier ring, 40's, in 18kt yellow gold with platinum front, formed by a central emerald-cut spinel and rose-cut diamonds on the sides. Weight: 11.9 gr..

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Formed by an emerald-cut smoky topaz, estimated at 48 ct. set in claws. .

Formed by a central emerald in its cut, estimated weight of 0.95 ct. accompanied by ribbons of diamonds, pear and rose cut. .

With geometric design studded with brilliant-cut diamonds, total estimated weight 0.40 ct..

19th century rosette ring in 18 kt. yellow gold and platinum settings, with old-cut diamonds set in chaton.

PLATINUM AND 18KT YELLOW GOLD DIAMOND ENGAGEMENT RING18kt yellow gold mounting with platinum crowns with three diamonds. Center approx. 0.80 ct old-mine cut diamond flanked by two diamonds, each appro

Bracelet, 1940s, 18kt yellow gold links and platinum details. Chiselled decoration with vegetal motifs.

18k yellow Gold and Platinum on top, featuring Single cut and Rose cut Diamonds, embellished with applicationsof blue enamel. Ring size: 4. Total weight: 955 grams. Ring width: 0.64 inches.

GIA CERTIFIED 18KT YELLOW GOLD AND PLATINUM ENGAGEMENT RING. 3D HALO HEXAGON DESIGN. DIAMONDS ARE F/G COLOR, VSSI CLARITY 1.04 CARATS. FANCY CANARY DIAMOND IS 8.14 CARATS. MEASURES 18MM WIDE. RING SIZ

Ladies' fancy 18kt Yellow Gold & Platinum ring, in classic band style. Set with large emerald cut Amethyst stone weighing approx. 3.00cts twt., flanked on both sides by small round accent Diamonds, we

Ladies' retro Italian 18kt Yellow Gold & Platinum ring designed in the form of a belt. Designed with woven open work platinum bordered by 18kt Yellow Gold. Marked "Italy/18K/960PT". Ring size 8. Weigh

Vintage, but exact age unknown - beautiful diamond.33 ctw) ring with a 18kt yellow gold band and 950 platinum prong crown that holds the diamond. It is stamped with the maker's mark which I cannot rea

18KT YELLOW GOLD AND PLATINUM ENGAGEMENT RING. 3D CLASSIC OVAL HALO DESIGN. DIAMONDS ARE F/G COLOR, VSSI CLARITY .56 CARATS. FANCY YELLOW DIAMONDS ARE 1.15 CARATS. MEASURES 10MM WIDE. RING SIZE 6.50.

18KT YELLOW GOLD AND PLATINUM ENGAGEMENT RING. 3D CLASSIC OVAL HALO DESIGN. DIAMONDS ARE F/G COLOR, VSSI CLARITY .56 CARATS. FANCY YELLOW DIAMONDS ARE 1.15 CARATS. MEASURES 10MM WIDE. RING SIZE 6.50.

Stunning David Webb 18Kt Yellow Gold & Platinum Jade Cabochon Ring accented with sapphires and diamonds. Circa 1980. It is 35mm high at the front, ring size 6,. 71.7 grams W40863

A David Webb Ladies 18kt. Yellow Gold, Platinum and Diamond Ring, Set with sixteen round brilliant cut diamond melee, approx. between 0.05-0.23 pts., VS clarity and F-G color, approx. total weight 2.0

18Kt Yellow Gold / Platinum Tiffany & Co Ring. Ring has 2 Tone Filigree Wedding Band. Ring size: 10.00. Total weight: 10.76 Grams.

18Kt Yellow Gold / Platinum Tiffany & Co Ring. Ring has 2 Tone Filigree Wedding Band. Ring size: 10.00. Total weight: 10.76 Grams.

18kt Yellow Gold, Platinum, Diamond & Gemstone Ring Size 9.5, tapered shank ring featuring an oval cut green tourmaline center stone (2.4ct) in a half bezel setting accented with diamond rounds (I-SI2

18Kt Yellow Gold / Platinum Tiffany & Co Ring. Ring has 2 Tone Filigree Wedding Band. Ring size: 10.00. Total weight: 10.76 Grams.

An 18kt Yellow Gold, Platinum and Diamond Ring, Set with nine rose cut diamond melee. Each approx. 0.01 pts each. Marked Plat. 18K. Size: 8 3/4 Approx. weight: 1.8 dwt

18 Kt. yellow gold and platinum ring with squared shank, center 4-prong set with one Round Brilliant cut Diamond [H/VS-2], approximately 0.68 ct., accented with 22 full cut round Diamonds [H/VS], appr

1920s One center blue Sapphire Approx 1.50 CT surrounded by 12 old miners Diamonds TW Approx. 1 CT. Clarity: VS1-SI1. Color: K-L. Ring size: 6.5.