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 they help to define the limits of what constitutes a mineral proper. The formal Nickel (1995) definition explicitly mentioned crystallinity as a key to defining a substance as a mineral. A 2011 article defined icosahedrite, an aluminium-iron-copper alloy as mineral; named for its unique natural icosahedral symmetry, it is a quasicrystal. Unlike a true crystal, quasicrystals are ordered but not periodic. Minerals are not equivalent to rocks. A rock is an aggregate of one or more minerals or mineraloids. Some rocks, such as limestone or quartzite, are composed primarily of one mineral—calcite or aragonite in the case of limestone, and