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 Casket (fairy tale) that (e.g. Tanyushka) are never completely "normal". Marina Balina mentioned Freud's interpretation of the motif of a double as a symbolic manifestation of death. The theme of the person leaving for the mountains at the end of his life is present in the story. Similar plot device can be found in "Two Lizards". "The Malachite Casket" is considered to be one of the best stories in the collection. The style of the story was praised. "The Malachite Casket" has been a popular subject for analysis. During Soviet times, every edition of "The Malachite Box" was usually prefaced by an essay