Property from a Private California Collection. The Demantoid Cushion cut Garnet is approx. 2.89 carats, one of the rarest gems is the world, they were mined in the Ural Mountains in Russia and become extremely scarce. The light green faceted stone has been successfully electronically tested. The ring is Marked 56 Zolotnik (58% gold/ 14kt) with Yakov Lyapunov Assayers Mark and the Karl Faberge Initials KF. The Rose Gold and diamond setting with approximately 70 Mine cut diamonds that test off the chart (high density), the design starts as three rows separated by V shaped shoulders and the outer band extend to the corners of the Demantoid with two prong fingers at each corner. The V Shaped shoulders background is blackened with a gold Niello technique to provide contrast. At any angle the design is aesthetically pleasing and a testament to the Masterful Faberge' designers. Includes original Karl Faberge' Moscow Ring Box. 'Demantoid was discovered in Russia in the early 19th century. In 1854, the noted mineralogist Nils Gustaf Nordenskiöld identified this gem as a variety of andradite garnet. These stones had such exceptional brilliance and dispersion or "fire" that they inspired Nordenskiöld to name demantoid after its "diamond-like" appearance...Demantoid was a popular gemstone during the Belle Époque period (1890-1915), especially in Art Nouveau jewelry. The Russian Czars particularly favored this gem.'