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" was released by Goslitizdat in 1944; the fourth by Sverdlovsk Publishing House in 1944; the fifth edition by Sovetsky Pisatel in 1947; the sixth by Goslitizdat in 1948; the seventh by Sverdlovsk Publishing House in 1949. The eighth was the last edition of "The Malachite Box" to be published during Bazhov's lifetime in 1950. In 1950 his decaying eyesight made the writing difficult. The last story "Zhabrei's Path" was published after his death. According to the All-Union Book Chamber's data as of 1 January 1981, the books in the Soviet Union were republished 253 times with a