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 Adveyeva sung the Mistress of the Copper Mountain (mezzo-soprano), Dina Potapovskaya sung Katya (coloratura soprano). The 1954 ballet "The Tale of the Stone Flower" was created by Sergei Prokofiev. "Skazy", also called "The Stone Flower", was the 1987 play of the Maly Theatre. A lot of Soviet and Russian composers drew inspiration from "The Malachite Box". The suite "Skazy" was created by Grigory Frid in 1948. Alexey Muravlev based his symphonic poem "Mount Azov" (1949) on the tale "Beloved Name". In 1979 Margarita Kesareva created a series of piano pieces "Ural Book" (Уральская тетрадь), which included the movement "The Bear