The Malachite Casket (fairy tale) Malachite Casket: Tales from the Urals" collection. In the 1950s another translation of "The Malachite Casket" was made by Eve Manning The talented miner Stepan dies, leaving his widow Nastasya (Nastyona) and their two sons and a daughter. Nastasya becomes the owner of the Malachite Casket filled with jewellery, which Stepan got from the legendary Mistress of the Copper Mountain. Only Tanyushka likes to play with the Casket, and every piece of jewellery looks good on her. With black hair and green eyes, Tanyushka does not look like her mother at all, as if she was born to different parents.
Mineral petrography), it may become transparent even if that property is not seen in a hand sample. In contrast, some minerals, such as hematite or pyrite, are opaque even in thin-section. Colour is the most obvious property of a mineral, but it is often non-diagnostic. It is caused by electromagnetic radiation interacting with electrons (except in the case of incandescence, which does not apply to minerals). Two broad classes of elements (idiochromatic and allochromatic) are defined with regards to their contribution to a mineral's colour: Idiochromatic elements are essential to a mineral's composition; their contribution to a mineral's colour is diagnostic.