Cronstedt Min. § 228. A. Lapis calaminaris.
It is almost always mixed with clay or calciform iron.
ZINCUM (zinc), mineralized by aerial acid. Aerated.
Cronstedt Min. § 228. A. 1.
ZINCUM (zinc) with aerial acid and mixed with ſiliceous matter. Siliceous.
D. A. Born ſent me chryſtals of this ſpecies, which expoſed to the fire gave out aerial acid, but they were not wholly ſoluble in acids.
ZINCUM (zinc), mineralized by ſulphur and iron. Black jack.