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 she catches the eye of a young noble man. She promises to marry him if he shows her the Tsarina herself at the Malachite Room of the Palace. Danilo the Craftsman hears about a most beautiful Stone Flower grows in the domain of the Mistress of the Copper Mountain. He goes to the mine and begs the Mistress to show him the Flower. The Mistress warns Danilo that he would never want to go back to his people, but he insists. She then shows him the Malachite Flower. Danilo disappears from the village, leaving his fiancée Katyenka behind. Danilo's story