Lapis armenus
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Lapis armenus, also known as Armenian stone or lapis stellatus, in natural history, is a kind of precious stone, nearly resembling the lapis lazuli, except that it is softer, and instead of veins of gold, is intermixed with green.
Herman Boerhaave believed it rather to rank among semi-metals, and supposed it was composed of both metal and earth. He added that it only differs from lazuli in degree of maturity, and that both of them seem to contain arsenic.
It has been found in Tirol, Hungary, and Transylvania, and used both in mosaic work, to make the blue color azure, and as a treatment of melancholia.[1]
[edit] References
- This article incorporates content from the 1728 Cyclopaedia, a publication in the public domain. [1]
- ^ Burton, Robert (1621). SUBSECT. II.—Simples purging Melancholy downward.. The Anatomy of Melancholy. Retrieved on 24 May 2006.
