The Malachite Box nuggets. The story of the brothers is continued in "The Snake Trail" (alternative translation: "The Serpent's Trail"), published in 1939. In this "skaz", a young the factory worker Stepan meets the legendary Mistress of the Copper Mountain. He passes her tests and is rewarded by a malachite casket filled with jewellery for his betrothed, Nastyona. Stepan dies, leaving the Malachite Casket to his widow Nastyona. Their daughter Tanyushka likes to play with it. With black hair and green eyes, Tanyushka does not look like her mother at all, as if she was born to different parents. When she grows up,
Mineral the sample reflecting different colours as it is turned, while pleochroism describes the change in colour as light passes through a mineral in a different orientation. Iridescence is a variety of the play of colours where light scatters off a coating on the surface of crystal, cleavage planes, or off layers having minor gradations in chemistry. In contrast, the play of colours in opal is caused by light refracting from ordered microscopic silica spheres within its physical structure. Chatoyancy ("cat's eye") is the wavy banding of colour that is observed as the sample is rotated; asterism, a variety of chatoyancy,