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 such magical help is no longer necessary, because the Soviet society has righted all the wrongs of a fairy-tale reality. Tatiana Kruglova comments that there is a clear split of characters based on their social class: there are working men, most often depicted as positive characters, and their masters, shown critically or ironically. But in the pre-war stories the class criteria existed as the background only. The conflict between the characters came from the collision between poetic and pragmatical, grand and common, irrational and rational. "The Malachite Box" and its author became enormously popular. It was met with significant praise