Mineral Examples of such minerals are malachite (green) and azurite (blue). In contrast, allochromatic elements in minerals are present in trace amounts as impurities. An example of such a mineral would be the ruby and sapphire varieties of the mineral corundum. The colours of pseudochromatic minerals are the result of interference of light waves. Examples include labradorite and bornite. In addition to simple body colour, minerals can have various other distinctive optical properties, such as play of colours, asterism, chatoyancy, iridescence, tarnish, and pleochroism. Several of these properties involve variability in colour. Play of colour, such as in opal, results in
The Malachite Box "The Mistress of the Copper Mountain" and "The Malachite Casket", was created by Dmitry Batin. Two filmstrips were released, "The Fire-Fairy" (1956) and "The Malachite Box" (1972). "The Stone Flower" was adapted for stage many times. The first ballet of the same name was created by Alexander Fridlender in 1944. The opera in four acts "The Stone Flower" by Kirill Molchanov premiered on 10 December 1950 in Moscow at the Stanislavski and Nemirovich-Danchenko Music Theatre. Sergey Severtsev wrote the Russian language libretto. It was the first opera of Molchanov. The role of Danila (tenor) was sung by Mechislav Shchavinsky, Larisa