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) me the Tsarina, and you've done it so as to show me to her. [...] I don't want to see any more of ye". Adding that he is no match for her anyway, Tanyushka leans against the malachite wall and melts away. She is never seen again, but the Mistress of the Copper Mountain gets a twin—people see two maids in malachite robes. Most scholars agree that Tanyushka—literally or metaphorically—is the daughter of the Mistress of the Copper Mountain. It was suggested that the Casket symbolizes the mystery that connected Stepan and the Mistress, or the secret marriage between the