This is the lilac stichtite cabochon. Dimensions: 0.7 x 0.5 x 0.2″ (1.8 x 1.2 x 0.4cm). Weight – 0.05oz (1.3 grams). Origin: Russia, Altai.
Some information about stichtite:
Stichtite is a mineral, a carbonate of chromium and magnesium. Its colour ranges from pink through lilac to a rich purple colour. It is formed as an alteration product of chromite containing serpentine.
Discovered in 1910 on the west coast of Tasmania, Australia, it was first recognised by A.S. Wesley a former chief chemist with the Mount Lyell Mining and Railway Company, it was named after Robert Carl Sticht the manager of the mine.
Stichtite has been reported from the Altai Mountains, Russia; the Barberton District, Transvaal; Darwendale, Zimbabwe; near Bou Azzer, Morocco; Cunningsburgh, the Shetland Islands of Scotland; Langban, Varmland, Sweden; Langmuir Township, Ontario and the Megantic, Quebec; Bahia, Brazil; and the Keonjhar district, Orissa, India.