SOLD Antique Tiffany & Co 14k White Gold Sugarloaf Cabochon Chrysoprase Ring

Antique Art Deco 14k White Gold Sugarloaf Cabochon Chrysoprase Ring ¿Tiffany & Co. 1° I cannot say for certain that this is indeed a Tiffany & Co. ring. 2° Tiffany & Co. previously declined to authenticate this ring. 3° According to a jeweler, this ring was previously resized. There is NO hallmark or stamp that would aid in authenticating it as Tiffany & Co. There is a faint 14k stamp inside the ring. The chrysoprase sugarloaf cabochon has a tiny flea bite knick in it. Known provenance of this ring .. I purchased this ring in New York City from an antiques jewelry dealer at the 26th Street Flea Market in 2005. During winter 2011-2012, while working as a processing archivist at Tiffany & Co on the John Loring papers, I discovered in his “Tiffany’s 20th Century A Portrait of American Style”, on pages 86 and 87 design sketches “x4239” for “Tiffany & Co. 1920s ring designs and jewelry” very closely resembling this ring. In an email with the archives, they declined to see the ring, and would not authenticate the ring due to a lack of hallmark. I've added images of the book with the referenced pages. I’ve searched sold listings here on Poshmark, eBay, and other websites, but have found no similar rings as this one. The ring fits my left ring finger, which sizes between 4.5 and 4.75. So it is petite. Please do not hesitate to make an offer, ask questions, or if you have insight into this ring, please message me. Thank you. Wear in Good Health and Fine Spirit 🕊