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 Malachite Box The Malachite Box or The Malachite Casket () is a book of fairy tales and folk tales (also known as "skaz") of the Ural region of Russia compiled by Pavel Bazhov and published from 1936 to 1945. It is written in contemporary language and blends elements of everyday life with fantastic characters. It was awarded the Stalin prize in 1942. Bazhov's stories are based on the oral lore of the miners and gold prospectors. The first edition of "The Malachite Box" was released on 28 January 1939. It consisted of 14 stories and an introduction, which contained