In this way the blende, which always accompanies galena in a greater or smaller quantity, is well separated.
Masses of sulphuret of zinc, in the form of blende, were noticed at this locality.
blende is found in great quantities in Derbyshire and Cumberland, as also in Cornwall.
Zinc is smelted in England, likewise from blende (sulphuret of zinc).
The ores are argentiferous galena, accompanied by considerable amounts of blende and pyrites, all oxidized near the surface.
The blende is first roasted in huge furnaces specially built for the purpose.
The deposition of galena, blende, and pyrite in the Galena lead mines still continues.
It probably is not rich enough for amalgamation, as it contains a superior bulk of iron pyrites, blende, lead and earthy matter.
In the Cwnystwyth mines in Cornwall new and valuable deposits of ore and blende were located.
In the Missouri region, on the other hand, sphalerite and blende are the typical ores.