51�Թ�

I stuck my head inside a cabinet to get a close look at the rocks of the arsenic sulfides realgar and orpiment, blazes of flame orange locked within the crystals.

Green bice is prepared from the blue, by adding yellow orpiment, or by grinding down the green carbonate of copper.

The solidified juices, azure, chrysocolla, orpiment, and realgar, also frequently contain gold.

When the calx of arsenic is distilled with sulphur, the vitriolic acid flies off, and a substance of a yellow colour, called orpiment, is produced.

“I will take you to a place where anything may be bought—cobalt, lapis lazuli, cinnabar, orpiment, sandarac—and it is honestly sold.”