Typomorphic features of tourmalines of the Malkhan pegmatite field from the Irkutyanka vein

Jade or "Fei Cui" are trade names for a stone that typi- cally contains only one or more main minera

Most of the spinels are found in shades of red to purple. Colourless, green and cobalt bearing varie

Bohemian garnets, i.e., chromium-bearing pyropes, are found in several jewellery pieces from the Mig