PLATINUM AND DIAMOND CIRCLE PIN, Early-to-mid 20t

set with a marquise dangle approx. 0.45 carats, and 33 round diamonds approx. 2.60 carats, total diamond weight 3.05 carats (in our opinion: F-G color, SI1-2 clarity, however not guaranteed), pin test

Platinum open circle brooch, set with baguette and round diamonds - approx. 2.40ctw. Brooch is 30mm in diameter. Marked: Maker's Mark Irid. Plat. Weight - 8.5 grams.

This is an elegant vintage circle brooch pin rendered in fine platinum. The Art Deco pin is studded with 3.5tcw Old European and Old Mine cut diamonds of VS clarity and GH color. It is 1 3/8" diameter

Vintage Diamond Circle PinPlatinum pin with 2.48cttw diamonds. Color G-Clarity VS2. Diameter 1 1/4 inches (pin)From the Estate of Roberta Folonie Schuetz

Platinum double circle diamond pin/pendant. The pin is designed with a pair of intertwining circles set with diamonds. One is set with marquise cut diamonds in graduating size, the other is set with r

Pin contains 26 OMC and OEC cut diamonds. Approximately 1.5 cts, TW 12.5 dwt.

Mid Century Platinum Diamond Pin. Adorned with round and baguette cut diamonds - approx.4.00ctw . Measurements - Pin is 34mm in diameter. Tested - Platinum. Weight - 14.1 grams.

11.4 grams total weight. With old European and mine cut diamonds, 15 total. 3.25 ct. total, largest diamond .38cts. VS - SI clarity and I-J-K color. Small chip on central diamonds. Top of pin platinum

Mid Century Diamond, Platinum Pin Of sinuous design, featuring ninety-one marquise, round brilliant, baguette, and single-cut diamonds weighing a total of approximately 2.05 cttw., set in a platinum p

Mid century platinum drop brooch, with approx. 1.77ctw SI2/G-H diamonds. Brooch measures 38mm x 30mm. Weight - 7.2 grams.

Title: Antique 3ctw Fine Diamond Irid Platinum Art Deco Era Circle Pin Brooch Description: Classic circle pin featuring approx. 3.0ctw of very well-matched, white F-H color, clean VS, hi-performance d

DESCRIPTION:Antique platinum engagement ring. Finished with small diamonds along the sides of the bezel, surrounding a 0.5 ct diamond center stone. CIRCA:Early-Mid 20th Ct. ORIGIN: Italy DIMENSIONS:Ri

White gold (platinum?) & yellow gold pin set with diamonds (18); .05 round diamonds and (18) tiny diamonds; 2.3DWT; VG-EX

A mid 20th century platinum diamond half-circle eternity ring. Designed as a series of ten brilliant-cut diamonds, to the engraved half-band. Estimated total diamond weight 0.70ct. Ring size M1/2. Wei

80% Platinum Art Nouveau style floral ring with one larger center diamond and ten surrounding diamonds. Produced by the William Kinscherf Company of New York City, ca. early - mid 20th century. Americ

METAL: Platinum. MEASUREMENTS: Brooch is 58mm x 34mm. Center stone is missing, center will fit approx. 6.5mm stone. GEMSTONES: Diamonds approx. 3.00ctw. TESTED: Plat top/ Gold back. WEIGHT: 15.7 grams

Platinum open circle pin featuring old European and round cut diamonds, weighing approx. 2.00 ctw, and French cut black onyx, milgrain edge, 18K safety catch, 1.25 in. diameter, 5.8 grams Provenance:

DESCRIPTION: An Art Deco Platinum ring garnished by three round cut diamonds each weighing approx. .20 cts. Stamped along the inner band "Plat". Total Weight: 5.3 Grams (3.4dwt) CIRCA: Early-Mid 20th

Item/Description: Elegant Deco Retro era circle pin brooch fashioned as a wreath or ribbon from platinum and set with sparkly white round diamonds graduated in size. Approximately one half carat CTW.

Weighs 10dwt and measures 1 5/8” diameter

Title: Vintage Tiffany & Co. 3ctw Fine Diamond 0.75ctw Natural Ruby Platinum Art Deco Circle Pin Brooch Description: Signed Tiffany & Co. platinum circle pin featuring approx. 3.0ctw of the fieriest

Mid century platinum and 18k yellow gold brooch with rose cut and old mine cut diamonds. Center diamond approx. 0.21ct, surrounding diamonds approx. 1.60ctw. Brooch is 48mm x 38mm. Tested: Plat, 18k.

Yellow gold 14 Kt and platinum diamond cluster brooch with 39 diamonds in concentric circle at center of pin. Acid tested. Weight 4.1 dwt. Condition: Excellent condition. L. 2-1/8" D 1/2". Copy and pa

Early platinum 7 diamond, 8 rectangular caliper-cut sapphire Art-Deco filigree bar pin. (4.2 dwt.) Vintage J.E. Caldwell leather box included but not original to pin.