Tourmaline comprises a large range of cyclosilicate minerals and is available in a plethora of colors. This mineral is hard and transparent and very resistant to oxidation. The name is derived from the Sinhalese word “tourmali”, which means “mixed”. As it exhibits remarkable healing properties it has become one of the most popular precious stones. Tourmalines are encountered across all geological formations in America and Indonesia.
Tiger’s eye is a translucent variety of quartz, with a golden-yellow color. It exhibits a characteristic linear iridescence like a moving reflection. These lines are golden and brown in color and retain the fibrous structure of crocidolite. This very characteristic optical effect is known by the French word chatoyancy, which means “cat’s eye”. The Tiger’s eye is encountered in USA, South Africa, Namibia, and Brazil. There is a darker tiger’s eye variety called Hawk’s Eye, which is deep blue, and another one called Bull’s Eye, which is deep red.