Chemija / Chemistry
 ISSN 0235-7216 ISSN 2424-4538 (online) |
2014 m. Nr. 2 The dependence of emeralds and chromaquamarines colours on chemical elements
Beryls, that are found in Zambia, Tanzania and Australia, are characterized by particularly beautiful greenish blue hues with a bright pleochroism. These minerals contain a small amount of chromium and vanadium, however, they are relatively rich in iron which determines a bluish colour and provides pleochroism. The author distinguished a new variety that is called chromaquamarine. Chromium or vanadium impart a green colour in emerald, divalent iron imparts a light blue colour for aquamarine and all three previously mentioned chemical elements impart a bluish colour with a greenish hue for chromaquamarine.
Keywords: chromaquamarine, emerald, aquamarine, beryl |
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