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1 "Azure stone;" generally supposed to have been a species of Lapis lazuli or azure. Beckmann is of opinion that it was a mineral or mountain blue, tinged with copper.
2 It is found in China, Persia, Siberia, and Bucharia.
3 Ultramarine is prepared from Lapis lazuli, and an artificial kind is extensively in use, which equals the native in permanency and brilliancy of colour, and is very extensively employed in the arts. Theophrastus, De Lapid. sec. 55, speaks of this artificial ultramarine.
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