Mineral Species: Labradorite

Chemical Formula: (Na,Ca)Al2Si3O8

Chemical Name: Calcium Sodium Aluminium Silicate

Mineral Class: Tectosilicate

Mineral Notes: Labradorite is an unusual mineral. Its displays an irridescent play of colours, caused by internal fractures in the mineral that reflect light back and forth, dispersing it into different colours. This effect, known as labradorescence, gives Labradorite its appeal and popularity. Specimens on sale are usually polished or sliced to fully bring out this phenomenon.