Cronstedt Min. § 247.
It is found variouſly mixed, principally with arſenic, iron and copper, but whether mechanically or by a more intimate union I know not.
COBALTUM (cobalt), mineralized by acid of arſenic. Red.
Cronstedt Min. § 248.
The ſmall ſpecimens that I have been able to examine point out ſuch a compoſition[[75]].
COBALTUM (cobalt), contaminated by iron and vitriolic acid. Vitriolic.
Cronstedt Min. § 250.