What is "caledonite"

Caledonite \Ca*led"o*nite\, n. (Min.) A hydrous sulphate of copper and lead, found in some parts of Caledonia or Scotland.

n. (context mineral English) A basic carbonate / sulfate mineral of copper and lead

Caledonite, whose name derives from Caledonia, the historical name of its place of discovery ( Scotland), is a richly colored blue-green sulfate- carbonate mineral of lead and copper with an orthorhombic crystal structure. It is an uncommon mineral found in the oxidized zones of copper-lead deposits.