A Silver Topped Gold, Cat's Eye Quartz and Diamond Brooch, Circa 1890, containing one oval cabochon cut cat's eye quartz measuring approximately 26.40 X 16.50 X 7.19 mm and 32 old mine cut diamonds weighing approximately 1.60 carats total.Accompanied by an American Gemological Laboratories Identification certificate number CS 1079062, dated October 17, 2016, stating Mineral Type: Natural Quartz, Variety: Cats-Eye, Color Description: Brownish Greenish Yellow, Strength of Cats-Eye: Prominent to Strong, Quality of Cats-Eye: Very Good, Enhancement: None. 6.40 dwts.