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Updated: May 29, 2025
The white is made of gypsum, mixed with albumen or honey; the yellows are ochre, or sulphuret of arsenic, the orpiment of our modern artists; the reds are ochre, cinnabar, or vermilion; the blues are pulverised lapis-lazuli, or silicate of copper. If the substance was rare or costly, a substitute drawn from the products of native industry was found.
The reduction of silver ore costs on an average, from three to five times as much as the reduction of auriferous quartz. The silver ore of Esmeralda and Coso is a sulphuret of silver, nearly all the veins having the same material, though the amount of it scattered through the vein-stone differs greatly in different lodes.
"If ever you feel violently impelled to drown yourself, take pulsatilla; but if you feel a preference towards blowing out your brains, accompanied with weight in the limbs, loss of appetite, dry cough, and bad corns, /sulphuret of antimony/. Don't forget." Though poor Mr.
They then left the transformation to complete itself, and it would not take less than ten or twelve days for the sulphuret of iron to be changed to sulphate of iron and the alumina into sulphate of alumina, two equally soluble substances, the others, flint, burnt coal, and cinders, not being so.
Silver, in the form of a chloride, sulphuret, or an amalgam, or in its native state, and associated with lead and other metals, and at Arqueros with pure native copper, occurs chiefly in the upper great gypseous or cretaceo-oolitic formation which forms probably the richest mass in Chile. Hence comes Molina's remark, that silver is born in the cold and solitary deserts of the Upper Cordillera.
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