Blue Topaz Claddagh Ring: heart cut vintage Clyde Duneier 10K solid yellow gold

Beautiful, elegant, and dainty Irish Claddagh solitaire/statement ring! Featuring an 8mm light color heart cut Swiss Blue Topaz, set in 10K solid yellow gold. The semiprecious Blue Topaz gemstone represents the December birthstone, and is perfect for those born in that month. Marked CID (Clyde Duneier) 10KP; and acid tested. This ring is a size 7 This ring weighs 3.00g This ring measures 12.5mm from the front; and 2mm from the back of the band. Vintage condition: Good (the stone is very slightly loose; some minor wear on the setting/band). Blue topaz is a gorgeous gemstone which is very very rarely found naturally in nature, and usually the result of a white or colorless topaz undergoing radiation and heat treatments to produce its vibrant color. The vast majority of white topaz is mined in Brazil. Blue topaz is a common imitation or replacement for aquamarine, so to the similarity in color. The first treated blue topaz stones hit the gem and jewelry markets in the early 1970s; before then, the most common imitations of aquamarine were blue spinel and blue zircon. Until the 1970s, most common topaz jewelry only displayed colors between clear, yellow, and lightish brown.