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A name given by English miners to sphalerite, or zinc blende; Ð called also false galena.

Magnetic pyrites, copper pyrites, zinc blende and arsenical pyrites are other and less important examples, the last constituting the gold ore formerly worked in Silesia.

Such calciners are used especially in roasting zinc blende into zinc oxide, and in the conversion of copper sulphides into chlorides in the wet extraction process.

Those lines you see are ultra-violet, made visible to the eye by activation of a radioactive compound whose rays in turn impinge on a zinc blende sheet.

The most important mineral of zinc is the sulphide, sphalerite or "zinc blende."