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 showed that he used vague folkloric beliefs and molded then into an original mythology. When asked whether his early stories were closer to folklore sources, Bazhov agreed. As time went by, he became less depended on the folklore and more independent as a writer. The current consensus among the folklore specialists is that he used the fragments of legends and bound them together by his own creative imagination. The first edition of "The Malachite Box" was released on 28 January 1939. It consisted of an introduction titled "The Watchhouse on Dumna Mountain" and 14 stories, based on the oral lore