An Art Nouveau 18 Karat Yellow Gold, Russian Demantoid Garnet and Diamond Ring, containing one oval mixed cut demantoid garnet weighing 1.26 carats, two old mine cut diamonds weighing approximately 1.30 carats total and four old mine cut diamonds weighing approximately 0.02 carat total.Stamp: 18. Accompanied by an American Gemological Laboratories garnet identification and origin report number 1088620, dated December 1, 2017, stating Mineral Type: Natural Andradite Garnet, Variety: Demantoid, Measurements: Approximately 6.40 x 6.00 x 4.02 mm, Origin Provenance: Russia (Ural Mountains). 2.30 dwts.