Group of Three Ammolite Cabochons
Southern Alberta, Canada
Ammolite was first discovered by the Black Foot Tribe in an area bordering the Canadian Rockies. In 1908, a member of the National Geological Survey team found mineralized opalescent fossil shells from prehistoric sea creatures known as ammonites along the St. Mary River in Alberta. It was not until 1981, however, that enough high quality ammolite was discovered to make commercial mining of this beautiful organic gem material viable. Ammolite is now considered Canada's finest gemstone. Its mineral composition of aragonite (calcium carbonate) is similar to that of pearls, with multiple thin layers; its fascinating iridescence is created by light interference and refraction within these layers.
Largest measures 3.5 x 3.25in