72.81 Gram Pretty Demantoid Garnet Specimen with Mother Rock From Iran

20.68 Gram Pretty Demantoid Garnet Specimen Weight: 20.68 Gram Dimension: 2.2 x 2.9 x 2.7 Cm Origin: Belqeys Mountains ( Koh-e-Belgheys), Iran Color: Green Demantoid is the green gemstone variety of the mineral andradite, a member of the garnet group of Minerals. Andradite is a calcium- and iron-rich garnet. The chemical formula is Ca₃Fe₂(SiO₄)₃ with chromium substitution as the cause of the demantoid green color. Ferric iron is the cause of the yellow in the stone Demantoid was a popular gemstone during the Belle Époque period (1890-1915), especially in Art Nouveau jewelry. The Russian Czars...

13.72 Gram Pretty Green Tourmaline Specimen With Albite From Stak Nala, Skardu, Pakistan Weight: 13.72 Gram Dimension: 2.1 x 4.1 x 2.1 Cm O...

This huge 55.98-gram prime example of the rarest species of garnet is from Merelani Hills, Manyara Region, Tanzania. This perfectly-hued, incredibly gemmy and lustrous specimen of th...

This formation of extremely lustrous, sharp calcite crystals from China features one type of calcite atop another, texturally contrasting species of calcite in a stalactitic formatio...