"The Armenian stone" is so similar to lapis lazuli that it has often not been distinguished from it;[1][2] Webster's Revised Unabridged Dictionary for instance treats the two terms as synonyms.
[3] The Dictionary of Traded Goods and Commodities 1550-1820 defines lapis armenus as Armenian stone, or azurite, a naturally occurring basic copper carbonate, originally from Armenia, but later from Germany, from which blue bice was prepared.
Herman Boerhaave believed it rather to rank among semi-metals, and supposed it was composed of both metal and earth.
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.
[5] The Encyclopedia Perthensis of 1816 notes that Armenian stone "was anciently brought of Armenia, but now found in Germany, and Tyrol".