French 19th Century light yellow natural color diamond (approx. 2.20 carats TW, G.I.A certificate, 8.05 x 6.90 x 5.05mm, natural diamond) ring set in a fancy 18K yellow gold mounting, signed, numbered 3056, c. 1890
American Art Deco ring (likely by Louis C. Tiffany for Tiffany & Co.) set with a large blue zircon (approx. 64 carats by calculation, 20mm x 20mm x 19mm) set in a fancy platinum mount further set with 14 round cut diamonds, four bullet shaped gold/orange citrines and two kite shaped gold/orange citrines, marked: very deeply stamped letters as a maker’s mark on the inside of the shank, c. 1930
***Top quality gem blue zircons over 10 carats trade at a minimum price of $200 per carat and go up from there depending on the size of the stone and the quality of the color. Blue zircon, the most popular color, is produced by heat treatment of brown zircon. But not all brown zircon will turn blue when heated; only some zircon has the right physical structure for this to occur. This is why most blue zircon comes from certain sources in Cambodia or Burma. Blue zircon is a reasonably hard gem with a Mohs hardness of about 7 to 7.5. Blue zircon has some unique properties that make it very popular with gemstone aficionados. Not only does zircon have outstanding brilliance, but it also has very strong dispersion or fire, the tendency to split white light into the spectral colors. Zircon also has very pronounced birefringence or double refraction, with a wide variance between the two refractive indices. This can be often be observed with the naked eye when you look down through the table of a cut zircon; you will observe facet doubling that makes the facet edges appear blurred.
Neil Lane solitaire “Cognac” orange/brown diamond ring (1.87 carats natural color, GIA certificate) set in a double loop through design all in 18k gold with micro pave work throughout, signed, c.2006
Art Deco Emerald step cut diamond solitaire ring, center cut emerald diamond (3 carats 10.30 x 7.20 x 4.3mm, Clarity VS-1, Color I/J, UGL certificate), with surrounding round brilliant cut diamonds, French cut natural sapphires (approx. 0.60 carats), all set in platinum mounting, c. 1930’s
Edwardian Sugarloaf Fire Opal (approx. 4 carats TW) ring with 32 diamonds set in a milligrain platinum topped 18K yellow gold mounting, marked, c. 1910
Andrew Grima “Comet” ring, Asymmetric cut citrine mounted in 18K textured yellow gold, five diamonds, signed: GRIMA, 0.750 (in a rectangle cartouche, AG Limited (in a rectangular cartouche), Crown, 18, Lion’s Head (for London), q (date mark for 1971), 1971
French 1950’s “Turban Style” ring, large pearl (G.I.A. certificate, Weight of the pearl: 16 grams, bead cultured pearl, saltwater, drop shape, white color, “Orient” overtone) and fancy diamond ring set with two triangle diamonds (approx. 2 carats TW) and 48 round diamonds (approx. 8 carats TW) all set in platinum, signed
Chanel, Paris “Camellia” 18k yellow gold articulated blossom ring set with 75 round full-cut white diamonds (approx. 1.50 carats TW) and 101 round full-cut yellow diamonds (approx. 1.00 carat TW) and 94 round full-cut demantoid garnets (approx. 1.00 carat TW) all in 24 heart shaped hinged and moveable flower petals with a central cluster of 7 round full-cut diamonds, signed: Chanel in a rectangle, 750 in a cartouche, size: 7 1/4, c. 1980’s
Neil Lane “Egyptian Motif” ring, step-cut emerald shaped Peridot (approx. 18+ carats TW, G.I.A. certificate, 18.55 x 14.85 x7.90mm) 18K gold with pave set diamonds, signed, c. 2008
Neil Lane Couture, large rectangular step-cut natural gem Peridot (18.12 carats, dimensions 18.55mm x 14.85mm x 7.90mm, GIA certificate) in an elaborate 18k gold “Egyptian” motif mounting set with 158 full, round-cut small diamonds (approx. 1.58 carats TW) and signed by Neil Lane, c. 2008
French Art Deco Diamond and sapphire ring, Round rose cut diamond (approx. 3 carats) set with sapphires (approx. 1.5 carats TW) in a platinum mount, signed, c. 1930
Champagne “Mughal” Diamond ring, Round rose cut fancy light to fancy brownish yellow natural color center diamond (G.I.A. certificate, 5.50 carats) encircled with 12 old mine cut brilliant diamonds (G.I.A. certificate, near colorless approx. 8 carats TW) and 12 small round old mine cut diamonds all set in white and yellow gold, mid 19th Century
French Art Deco ring set with a fine jadeite oval cabochon, faceted and caliber cut onyx, and further set with 18 round diamonds and six square French-cut diamonds all set in a millegrain platinum mount, c. 1920’s
Neil Lane heart shaped natural sapphire solitaire ring, 3.12 carats (GIA certificate, 8.56 x 9.62 x 5.13mm, no heat) with a diamond pave set platinum mounting, signed, c. 2005
Margaret De Patta (1903-1964) Modernist asymmetric sterling ring set with twenty square cut sapphires (approx. 9 carats TW ), signed: DePatta, Chevron mark of MDP, Sterling, c.1947
American “Retro Ruby” ring set with three square cut natural pink toned rubies (approx. 2 carats TW) in a 14K mounting, marked: RKV maker’s mark, 14K, inscribed with the initials H.R.P.to S.M.P., c.1940
Marchesini, Rome (attr.) Etruscan Revival mid-19th Century elaborate jeweled “Maltese Cross” 18k gold ring set with four rectangular step-cut sapphires and one round-cut sapphire and eight pearls in a highly detailed setting with granulation and twisted gold wire designs, c.1860
Guebelin Switzerland “Half moon” ring in 18K white brushed gold set with a large cabochon oval moonstone, two crescent moon shaped inset lapis lazuli stones and further set with two tapered baguette diamonds on either side, signed with the Guebelin cipher, 750 and Swiss, c. 1950’s
Edwardian cluster ring set with a natural Saltwater pinkish brown pearl (G.I.A. certificate) and 28 diamonds (approx. 7 carats TW) set within a silver topped gold mount, c. 1890’s
American Arts & Crafts ring, detailed and scrolling 14K gold mount with stylized leaves and blossoms surrounding a large cabochon amethyst (approx. 22+ carats TW), marked, c. 1915
Russian “Crest” ring, double headed eagle on a blue enamel background set with 17 round cut diamonds and multiple single cut diamonds all in a 14K gold mount (56 zolotniks), signed, c. 1905
Van Cleef & Arpels, New York, Art Deco “Heraldic” ring in 18k gold with stylized geometric flanges on either side of the platinum rectangular plaque with an intaglio carved Coat of Arms, signed Van Cleef & Arpels, NY, 9398, c.1930
European Art Deco “Chevron” design ring, 18K gold set with 24 square cut invisibly set rubies (approx. 6 carats TW) in a pyramid form, marked, c. 1940’s
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