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 continued in "The Master Craftsman" (alternative translations: "The Mountain Craftsman", "The Mountain Master"), published a year later in "Na Smenu!". "A Fragile Twig", published in 1940, focuses on Katyenka and Danilo's son. Bazhov had plans for the fourth story, but it was never written. "Golden Hair" is based on the Bashkirs folklore. It tell the story of a Bashkir hunter Ailyp who meets the daughter of Poloz the Great Snake. In addition to the stories mentioned above, the first edition of "The Malachite Box" contained the following 8 stories: "The Manager's Boot-Soles", "Sochen and His Stones", "Marko's Hill", "The Twisted