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 anniversary since the birth of Pavel Bazhov. The series included the following films: "Sinyushka's Well" (1973), "The Mistress of the Copper Mountain" (1975), "The Malachite Casket" (1976), "The Stone Flower" (1977), "Podaryonka" (based on "Silver Hoof", 1978), "Golden Hair" (1979), and "The Grass Hideaway" (1982). Three hand-drawn animated films were released by Soyuzmultfilm in the 1970s: "Silver Hoof" in 1977 directed by Gennady Sokolsky and written by Genrikh Sapgir, "The Master Craftsman" in 1978 directed by Inessa Kovalevskaya, was based on "The Stone Flower" and "The Master Craftsman"; "The Fire-Fairy" in 1979 directed by Natalia Golovanova. The Malachite Box The