The Malachite Box them are keepers of hidden underground riches. The Mistress, described as either a beautiful green-eyed woman in malachite gown or a lizard with the crown on her head, is the keeper of gemstones. Poloz is the master of every existing piece of gold. The miners believed that if a gold-bearing lode disappeared, it meant that the Great Snake moved it to a different place. Bazhov introduced numerous daughters of Poloz, including Golden Hair from the tale of the same name. The relationship between Poloz and the Mistress is unclear. Bazhov commented that he asked some story-tellers about it, but they
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.