| Massicot and orpiment, he considers as those which have been the least permanent amongst all the mineral colours. |
| Commonly associated minerals include orpiment, stibnite, a variety of sulfides and sulfosalts, calcite, and barite. |
| Even the arsenic mine at Shimen, Hunan Province, is still the source of minor amounts of good realgar, orpiment, and calcite. |
| Put some quicklime and red orpiment in water, place some warm ashes under it for a whole day, filter the liquor, and cork it down. |
| For example, it seems to have been used as a medium for vermilion and orpiment. |
| He accordingly mixed one part of red lead, four parts of blue bice, and a proper proportion of orpiment and verdigris. |
