{"product_id":"art-deco-diamond-and-ruby-greek-key-brooch-of-18k-gold","title":"Art Deco Diamond and Ruby Greek Key Brooch of 18k Gold","description":"\u003cdiv\u003eA refined Art Deco era brooch (circa 1920), designed as a geometric rhombus motif set with calibre cut rubies and single cut diamonds arranged in a Greek key pattern and accented by a luminous post set pearl. The piece is mounted 18 karat gold with a platinum overlay beneath the diamonds, a technique favored during the period to enhance the sparkle of diamonds while maintaining the strength and warmth of gold beneath.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe brooch measures 0.75 inches by 1.3 inches wide and weighs 1.53 grams, offering a delicate yet distinctive presence when worn. It is presented in great antique condition, with stones secure and surfaces well preserved.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eGemstone identification has been confirmed using Raman spectroscopy, a non-destructive analytical technique that provides a precise chemical fingerprint to verify authenticity. Metal authenticity has been professionally verified using XRF (X-ray fluorescence) analysis and traditional jeweler’s acid testing, confirming platinum-topped 18K gold construction.\u003cbr\u003e\u003cbr\u003eWatch the video \u003ca href=\"https:\/\/www.youtube.com\/shorts\/10vunMY5AOE\" target=\"_blank\" title=\"Art Deco Greek Key Brooch\" rel=\"noopener\"\u003eHERE\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Trademark Antiques","offers":[{"title":"Default Title","offer_id":43791440052289,"sku":"L457-A","price":2495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0445\/7909\/files\/art-deco-diamond-and-ruby-greek-key-brooch-of-18k-gold-3115287.jpg?v=1776959728","url":"https:\/\/trademarkantiques.com\/products\/art-deco-diamond-and-ruby-greek-key-brooch-of-18k-gold","provider":"Trademark Antiques","version":"1.0","type":"link"}