A black opal, old and single-cut diamond pierced geometric ring.Signed JoAq. Engraved 850 Plat. Ring

A black opal, old and single-cut diamond pierced geometric ring.Signed JoAq. Engraved 850 Plat. Ring size N. 6.1gms.

A sapphire and diamond geometric ring.Signed JoAq. Principal sapphire weight 3.18cts.Total non-principal sapphire weight 0.60ct.Total diamond weight 0.07ct.Engraved 850 PLAT. Ring size M. 4.7gms.

A diamond single-stone ring. The old-cut diamond, weighing 0.71ct, to the floral engraved shoulders and pierced floral sides. Principal diamond estimated tinted colour, SI clarity. Weight 2.4gms.

ART DECO DIAMOND RING, CIRCA 1930 The old brilliant-cut diamond, weighing 1.86cts between single-cut diamond geometric shoulders, hoop misshapen, ring size approx. P

BLACK OPAL AND DIAMOND RING Containing one oval cabochon black opal measuring approximately 23.00 x 15.00 x 6.45 mm and 34 transitional and single cut diamonds weighing approximately 0.65 carat total.

SAPPHIRE RING, CIRCA 1915-20 The cushion-shaped sapphire in a pierced mount millegrain-set with old cushion-shaped, old brilliant and old single-cut diamonds, between similarly-set shoulders, mounted

An Art Deco single stone black opal ring, An Art Deco single stone black opal ring, with diamond set shoulders. A circular tallow cabochon cut black opal, milligrain set to each shoulder, to a ridged

DIAMOND AND SAPPHIRE RING The old brilliant-cut diamond within a scrolling pierced mount set with single-cut diamonds and French-cut sapphires, principal diamond approx. 1.20cts, ring size approx. I

A un-treated black opal, diamond and eighteen karat bi-color gold ringdesigned as an oval cabochon black opal, measuring 14.49 x 12.65 x 6.51 mm, within pierced and millegrained round brilliant-cut di

Stunning Art Nouveau Black Opal Diamond and Demantoid Garnet Necklace 14K Gold. Articulated pendent supporting two fancy-cut black opals, accented by old mine-cut diamonds and demantoid garnets. &bull

LACLOCHE FRÈRES: ART DECO DIAMOND-SET BROOCH, CIRCA 1925 The onyx plaque, applied with a giardinetto motif set with carnelian cabochons, old single-cut and rose-cut diamonds, the geometric border

CARTIER: ART DECO DIAMOND-SET WRISTWATCH, CIRCA 1925 The rectangular dial with Roman chapters, the bezel set with old single-cut diamonds, between pear-shaped diamonds and similarly-set geometric open

Platinum and 2.31 ct. (GIA) diamond ring featuring a central oval cut diamond, 2.31 cts., G color, SI1 clarity, accented by baguette and single cut diamonds. Stamped, "Plat 10% Irid" and "". 6.3 grams

2.00ct VS2-SI1/H-J Old European-Cut Diamond Solitaire & Solid Platinum Ring W/1.50ctw Emerald, Sapphire & Diamond Accents - This ring is made of solid platinum, and has an approximate 2ct old European

AN UNHEATED YELLOW SAPPHIRE AND DIAMOND RING in platinum, set with a cushion cut yellow sapphire of 9.43 carats accented by old cut diamonds, stamped PLAT, size O / 7, 5.9g. Accompanied by a gemmologi

DIAMOND SINGLE-STONE RING Set with an old brilliant-cut diamond weighing 2.27 carats, between single-cut diamond shoulders, ring size approx. M

DIAMOND CROSSOVER RING Obliquely set with two old brilliant-cut diamonds, weighing 1.51 and 1.35 carats, between single-cut diamond shoulders, ring size approx. Q

Vintage Approx. 1.11 Carat Old European Cut Diamond, .95 Carat TW Caliber Cut Sapphire and Platinum Ring. Center diamond I color, VS2 clarity. Stamped Plat. Ring size 6-1/4. Approx. weight: 4.4 dwt, C

Brand: Signed King & Eisele. Material: Edwardian Platinum.Stone: Approx. 3.01CT old european cut Diamond(color JK clarity VS1). Weight: 4.66 Grams. Ring Size: 7.5. Circa: 1910. Antique.

ART DECO, DIAMOND RING Containing one old European cut diamond weighing approximately 1.15 carats and 52 old European and single cut diamonds weighing approximately 2.05 carats total. Mounted in plati

OPAL AND DIAMOND BROOCH, CIRCA 1890 The opal cabochon set within an open surround of old brilliant and single-cut diamonds, suspending an opal drop, diamonds approx. 070ct total, length 5.0cm

center square cut corner step-cut diamond estimated weight 1.05ct., H-I, SI, 32 old European and single cut diamonds estimated total weight 0.74ct., stamped ?A.P.?, tested platinum, size 5-3/4, 5.3 gr

ILLARIO FOR BULGARI: DIAMOND BANGLE/TRIPLE-CLIP BROOCH, CIRCA 1935 Of geometric and scroll design, set throughout with old brilliant and single-cut diamonds with baguette-cut diamond accents, the cent

DIAMOND BOW BROOCH, 1ST HALF OF THE 20TH CENTURY The pierced ribbon bow with scalloped edges, set throughout with old brilliant and single-cut diamonds, accented by a central cushion-shaped diamond, w