Sold2024An Art Decó old-cut diamond brooch, pAn Art Decó old-cut diamond brooch, platinum, unmarked, tested, with 51 old-cut diamonds and 16 diamond roses, weighing 5.58 ct fine white-slightly tinted white+ (G-I) /VVS-SI, l. 44 mm, 9.99 g, withSee Sold Price
Sold2024Tested platinum and diamond spray brooch: 22 grams 3 1/2" long; approx. 3.0 TCW (missing 2 diamonds)Tested platinum and diamond spray brooch: 22 grams 3 1/2" long; approx. 3.0 TCW (missing 2 diamonds)See Sold Price
Sold2022Vintage Platinum Diamond BroochVintage Platinum Diamond Brooch, Spectrometer tested platinum, with estimated approx. 1.35 carats diamonds both prong set and bead set also three baguette cut diamonds, pin mechanism works properly, 1See Sold Price
Sold2018ART DECO 7.76CTTW DIAMOND & PLATINUM BROOCH / CLIPEstate Art Deco platinum (tested) diamond double-clip brooch, c. 1930s, approx 7.46cttw, two fur or coat clips with pin mechanism to combine into single brooch, featuring pierced work and milgraining,See Sold Price
Sold2023JEWELRY: Art Deco Diamond & Sapphire Circle Brooch, tested platinum Art Deco open circle brooch withJEWELRY: Art Deco Diamond & Sapphire Circle Brooch, tested platinum Art Deco open circle brooch with milgrain, diamonds, and natural sapphires. Containing 28 bead- set transitional cut diamonds with aSee Sold Price
Sold2022JEWELRY: Platinum diamond brooch by Frank Walter Lawrence, tested platinum mounting with 14K yellowJEWELRY: Platinum diamond brooch by Frank Walter Lawrence, tested platinum mounting with 14K yellow gold pin stem, rectangular hand pierced design, center set with one marquise cut diamond, approximatSee Sold Price
20218.24ct Yellow Sapphire Platinum Diamond BroochPlatinum brooch, set with center approx. 8.24ct yellow sapphire (measures 12.7 x 11.89 x 6.2mm), surrounded with approx. 0.74ctw in diamonds. Brooch measures 28mm x 27mm. Tested plat. Weight - 10.3 grSee Sold Price
Sold2019Vintage Platinum & Diamond Brooch or PinVintage fancy and large floral and bow brooch. 139 high quality diamonds with a approx. weight of 9.60ct set in a hand fabricated platinum setting. Unmarked, tested for platinum. approx 1.5" X 2" withSee Sold Price
Sold2020Platinum Diamond Brooch PendantMETAL: Platinum. GEMSTONES: Diamonds approx. 3.00ctw. MEASUREMENTS: Brooch is 42mm x 33mm. has a hook on the bottom to attach a drop. TESTED: Plat. WEIGHT: 12.5 grams.Gemstones have not been graded foSee Sold Price
Sold2021Art Deco Filigree Platinum Diamond Brooch PinMETAL: Platinum. GEMSTONES: Old mine cut diamonds total approx. 1.55ctw. Center diamond approx. 0.65ct. MEASUREMENTS: Brooch is 51mm x 19mm. TESTED: Plat. WEIGHT: 10.1 grams.Gemstones have not been grSee Sold Price
Sold2021Platinum Diamond Broochcenter round cut synthetic blue sapphire approx. 7.6mm, approx. 156 old European cut diamonds estimated total weight 3.50cts., H-J, VS to SI, tested platinum, 13/16 x 2-7/8 in., 11.3 gramsÿ - ProvenaSee Sold Price
Sold20161920s Art Deco Emerald 1.95ctw Diamond Platinum BroochBrooch measures 41mm X 24mm. Old European and Old Mine diamonds measure a total approx. 1.95ctw. Marked plat. Weight- 7.2grams. Gemstones have not been graded for color and clarity ,and tested for claSee Sold Price
Sold2023Art Deco Platinum Diamond Brooch PinMETAL: Platinum. GEMSTONES: Diamonds (one stone is missing) - approx. 3.00ctw. MEASUREMENTS: Brooch is 63mm x 29mm. TESTED: Plat. WEIGHT: 11.9 grams.Gemstones have not been graded for color and claritSee Sold Price
Sold2023Art Deco Platinum Diamond Brooch PinMETAL: Platinum. MEASUREMENTS: Brooch is 35mm x 17mm. GEMSTONES: Diamonds approx. 1.40ctw (center stone approx. 0.40-0.44ct). TESTED: Plat top. WEIGHT: 7.7 grams.Gemstones have not been graded for colSee Sold Price
Sold201918k Gold Platinum Diamond Brooch PinMETAL: 18k Gold/ Platinum. MEASUREMENTS: Brooch is 79mm x 30mm. GEMSTONES: Diamonds approx. 115 stones. TESTED: 18k/plat top. WEIGHT: 11.7 grams.Gemstones have not been graded for color and clarity ,aSee Sold Price
Sold2016Art Deco Platinum Diamond Brooch PinBrooch measures 46mm x 22mm. Decorated with approx. 2.00ctw diamonds. Top tested plat. Weight - 10.7 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancSee Sold Price
Sold2022Art Deco Platinum Diamond Brooch PinMETAL: Platinum. MEASUREMENTS: Brooch is 45mm x 19mm. GEMSTONES: Diamonds approx. 3.00ctw, old mine cuts. TESTED: Plat. WEIGHT: 8.1 grams. Gemstones have not been graded for color and clarity ,and tesSee Sold Price
Sold2022Platinum Diamond Brooch PinMETAL: Platinum. MEASUREMENTS: Brooch is 40mm x 25mm. GEMSTONES: Diamonds approx. 1.80ctw. TESTED: Plat/Gold hardware/stem. WEIGHT: 8.5 grams.Gemstones have not been graded for color and clarity ,andSee Sold Price
Sold2023Midcentury Platinum Diamond Brooch PinMETAL: Platinum. GEMSTONES: Diamonds approx. 3.40ctw (one missing stone). MEASUREMENTS: Brooch is 38mm x 30mm. TESTED: Plat. WEIGHT: 13.6 grams.Gemstones have not been graded for color and clarity ,anSee Sold Price
Sold2020Art Deco Platinum Diamond Brooch PinMETAL: Platinum. GEMSTONES: old mine and rose cut diamonds approx. 263 stones., center stone is approx. 0.70ct. MEASUREMENTS: Brooch is 57mm x 40mm. TESTED: Platinum. WEIGHT: 18 grams.Gemstones have nSee Sold Price
Sold2019Platinum Diamond Brooch PinMETAL: Platinum. MEASUREMENTS: Brooch is 51mm x 26mm. GEMSTONES: Diamonds - approx. 1.50ctw. TESTED: plat. WEIGHT: 10.9 grams. Gemstones have not been graded for color and clarity ,and tested for clarSee Sold Price
Sold2016Antique Platinum Diamond Brooch PinPlatinum brooch features approx. 1.20ctw in diamonds set in platinum. Brooch measures 31mm in diameter. Tested platinum. Brooch weighs 5.3 grams. Gemstones have not been graded for color and clarity ,See Sold Price
Sold2021ESTATE 18KT GOLD, PLATINUM & DIAMOND BROOCHEstate 18kt yellow gold (tested) brooch, thirty-eight square-cut, channel-set red stones (synthetic), twenty-seven diamonds in platinum-topped setting, two bezel-set diamond and pearl drops, approx 1See Sold Price
Sold2018ART DECO 14k Gold Platinum Diamond Brooch Pin 8.3gArt Deco diamond brooch. Features an Art Deco reticulated design with pave and bezel set diamonds throughout the rectangular brooch. Unmarked but tested 14k with a platinum top. Approximately 0.55 carSee Sold Price
7 days LeftBonhamsAN 18K GOLD, PLATINUM AND DIAMOND BROOCH, WITH AN 18K GOLD, PALLADIUM AND DIAMOND BROOCHUS$1,500
May 21Sworders Fine Art AuctioneersA Burmese sapphire and diamond brooch, early 20th century,£1,600(1 bid)