![18K & Platinum 2.25 Ct. Diamond Brooch: 18K & Platinum 2.25 Ct. Diamond BroochWeighing 6.9 gramsSet with an app. 2.10 Ct. European-cut DiamondI Color, I1 ClarityRing Size 8](https://p1.liveauctioneers.com/1692/330287/178196190_1_x.jpg?height=310&quality=70&version=1716319455)
Platinum Brooches & Pins
![18K & Platinum 2.25 Ct. Diamond Brooch: 18K & Platinum 2.25 Ct. Diamond BroochWeighing 6.9 gramsSet with an app. 2.10 Ct. European-cut DiamondI Color, I1 ClarityRing Size 8](https://p1.liveauctioneers.com/1692/330287/178196190_1_x.jpg?height=310&quality=70&version=1716319455)
![Art Deco Platinum, Diamond Emerald Dress Clip: Art Deco platinum, diamond and emerald dress clip or brooch, this exquisite piece features an approximate 10mm carved fluted natural carved tear drop shaped emerald top presented on a highly stylized](https://p1.liveauctioneers.com/5855/332516/179331489_1_x.jpg?height=310&quality=70&version=1717634106)
![PLATINUM CIRCAL FLORAL DIAMOND BROOCH: Platinum diamond circle brooch Weight 9.16g. / Weight: 9.16g / Measurements: 1.25"H x 1.25"S / Provenance: From the descendants of Lollie Oliver, Pittsubugh PAPAYMENT DISCLAIMER ****SEE TERMS AND COND](https://p1.liveauctioneers.com/49/333222/179889687_1_x.jpg?height=310&quality=70&version=1718647837)
![Art Deco Platinum Diamond Brooch Gold Enamel Amethyst 14k Yellow: This is a beautiful Art Deco brooch, The frame is crafted from 14k yellow gold with platinum accent. It features a long triple layer oval shaped frame in yellow with black enamel surface and a large o](https://p1.liveauctioneers.com/1692/330287/178255951_1_x.jpg?height=310&quality=70&version=1716385067)
![Antique Art Deco Platinum Diamond and Pearl Brooch / Pendant: Immerse yourself in the glamour and sophistication of a bygone era with our exquisite Art Deco Platinum Pearl & Diamond Brooch / Pendant . Crafted during the illustrious Art Deco era, this brooch is a](https://p1.liveauctioneers.com/8264/330485/178188674_1_x.jpg?height=310&quality=70&version=1718090683)
![ART DECO PLATINUM AND DIAMOND BROOCH, 7.5g: An antique platinum pin brooch, featuring round, baguette, and trillion cut diamonds, testing platinum, with safety chain. L. 4cm](https://p1.liveauctioneers.com/1124/333788/180327061_1_x.jpg?height=310&quality=70&version=1718829113)
![ANTIQUE PLATINUM AND GOLD DIAMOND BROOCH, 4.5g: A French platinum and 14k yellow gold circle pin brooch, featuring bezel and claw set Old European and rose cut diamonds, brooch testing platinum, pin testing 14k gold, with French hallmarks. L. 2.2cm](https://p1.liveauctioneers.com/1124/333788/180326909_1_x.jpg?height=310&quality=70&version=1718891364)
![Platinum, Gold, & Diamond Art Deco Brooch: Ladies platinum and 14K white gold art deco brooch featuring a round brilliant diamond approximately 0.26 carats, Clarity-VS1, Color-H. The brooch is marked "14K" and XRF tests 14K on the ba](https://p1.liveauctioneers.com/525/332539/179372103_1_x.jpg?height=310&quality=70&version=1717698500)
![TWO ANTIQUE SAPPHIRE BAR PINS.: Two antique bar pins: a platinum and yellow gold pin that is set with approx. 2.5 ct. medium light violetish blue sapphires, most likely from Yogo Gulch, Montana, 2 1/4 inches long; and a 14k white go](https://p1.liveauctioneers.com/6170/333768/180429797_1_x.jpg?height=310&quality=70&version=1718828559)
![Gold, Platinum, & Diamond Brooch: Ladies 18K yellow gold and platinum brooch featuring nineteen (19) rose cut diamonds approximately 0.38 carats together, Clarity-I1, Color-I. The brooch XRF tests 18K gold on the back and 90% pla](https://p1.liveauctioneers.com/525/332539/179372017_1_x.jpg?height=310&quality=70&version=1717698500)
![Art Deco Platinum and Diamond Bow Brooch: a lovely antique brooch in a stylized bow with two dangling ribbons, containing numerous round single cut diamonds weighing approximately 1.25 carats total. The metal was tested and found to be platin](https://p1.liveauctioneers.com/6253/332449/179301280_1_x.jpg?height=310&quality=70&version=1717577449)
![TIFFANY&CO. BROOCH DIAMOND DRAGONFLY 950 PLATINUM: Tiffany&Co. Brooch Diamond Dragonfly 950 Platinum Brand: Tiffany & Co. Type: Brooch Material: Platinum Color: None Size: 21.0 x 20.0mm Accessories: None Accessories Notice: When purchasin](https://p1.liveauctioneers.com/6177/332290/179215118_1_x.jpg?height=310&quality=70&version=1717432081)
![Art Deco Diamond Pendant Pin Old Mine Cut Platinum 14k Floral Filigree: This is a stunning Art Deco pendant or brooch, it is crafted from platinum with 14k white gold pin. The piece features a long octagonal shape frame with a fleur de lis flex bail decorated with diamond](https://p1.liveauctioneers.com/1692/330287/178391850_1_x.jpg?height=310&quality=70&version=1716490090)
![Art Deco Platinum 19.80 Ct. Diamond Brooch: Art Deco Platinum 19.80 Ct. Diamond BroochWeighing 26.7 gramsSet with an app. 2.00 Ct. DiamondI Color, SI2 ClarityAlong with 184 European-cut Diamonds weighing app. 12.80 Ct.And 74 Baguette Diamonds w](https://p1.liveauctioneers.com/1692/330287/178196213_1_x.jpg?height=310&quality=70&version=1716319455)
![H.Stern 21.00 Carat Diamond 4.00 Carat Pear Shape Emerald Platinum Pin Brooch: Designer: H.STERN Title: H.Stern 21.00 Carat Diamond 4.00 Carat Pear Shape Emerald Platinum Pin Brooch Style: Pin Metal: Platinum Gemstone 1: 21 Carat Diamond Number of Stones: 87 Gemstone 2: 4 Carat](https://p1.liveauctioneers.com/3780/329167/177973872_1_x.jpg?height=310&quality=70&version=1715878703)
![Art Deco Platinum Frog Brooch with Diamonds and Emeralds: Art Deco Frog Brooch crafted in Platinum, featuring two Emeralds and Singe cut Diamonds weighing Approx. 0.30 carats. Graded colorless. Measurements: 1.0 x 0.9 inches. Total weight: 6.1 grams.](https://p1.liveauctioneers.com/7877/333606/180214149_2_x.jpg?height=310&quality=70&version=1718513102)
News about Platinum Brooches & Pins
![Harry Winston platinum and diamond ring rocked Doyle Fine Jewelry auction](https://www.liveauctioneers.com/news/wp-content/uploads/2023/04/Screenshot-2023-04-28-at-4.23.26-PM-1.png)
Harry Winston platinum and diamond ring rocked Doyle Fine Jewelry auction
NEW YORK – Jewelry sales at Doyle continue to surpass expectations at all levels of value. Auctions of Important Jewelry on April 27 and Fine Jewelry & Luxury Handbags on April 26 saw determined bidders from across the country and around the world drive exceptional prices throughout both sales, sending the week’s total past $6 million.
![Platinum sparkler, Remington bronze command attention at Abell Auction, May 22](https://www.liveauctioneers.com/news/wp-content/uploads/2022/05/Screen-Shot-2022-05-14-at-5.12.20-PM.png)
Platinum sparkler, Remington bronze command attention at Abell Auction, May 22
LOS ANGELES – Abell Auction Co. will present a fine art, antiques, 20th-century design and fine jewelry auction on Sunday, May 22, starting at 9 am Pacific time. Featuring property from prominent California estates, the online sale will be highlighted by an original Frederic Remington bronze Rattlesnake sculpture, estimated at $100,000-$150,000, and a collection of […]
![Picassos, Tiffany table, Agassiz platinum watch at Coker’s, June 18](https://www.liveauctioneers.com/news/wp-content/uploads/2011/06/2011_0608_9314248_lead.jpg)
Picassos, Tiffany table, Agassiz platinum watch at Coker’s, June 18
NEW MARKET, Tenn. – On Sat., June 18, commencing at 10 a.m. Eastern time, John W. Coker, Ltd., will conduct an eclectic Summer Estate Auction featuring exquisite timepieces and fine jewelry; paintings and decorative art; rugs and other quality antiques. Internet live bidding will be provided by LiveAuctioneers.com. From a Philadelphia art pottery collector’s estate […]
![Jasper52 presents Treasures of Time: Estate Designer Jewelry May 28](https://www.liveauctioneers.com/news/wp-content/uploads/2024/05/178015692_1_x.jpg)
Jasper52 presents Treasures of Time: Estate Designer Jewelry May 28
NEW YORK – On Tuesday, May 28, starting at 7 pm Eastern time, Jasper52 will conduct a sale titled Treasures of Time: Estate Designer Jewelry, consisting of exactly 221 lots. Absentee and Internet live bidding will be available through LiveAuctioneers. Highlights include an 18K gold and diamond bracelet by the Italian jewelry firm of Roberto […]