realgar's Usage Examples:

ORPIMENT (auripigmentum), arsenic trisulphide, As2S3, or yellow realgar, occurring in small quantities as a mineral crystallizing in the rhombic system and of a brilliant goldenyellow colour in Bohemia, Peru, 'c.

Many substances were employed in ancient medicine: galena was the basis of a valuable Egyptian cosmetic and drug; the arsenic sulphides, realgar and orpiment, litharge, alum, saltpetre, iron rust were also used.

There are three known compounds of arsenic and sulphur, namely, realgar As2S2, orpiment As2S3, and arsenic pentasulphide As2S5.

"Arsenic, in its well-known and beautiful forms, orpiment and realgar, is found in New South Wales and Victoria.

Cinnabar, realgar, orpiment and coal form the rest of the mineral products of Kwei-chow.

Arsenic, in its well-known and beautiful forms, orpiment and realgar, is found in New South Wales and Victoria.

Arsenic is a constituent of the minerals arsenical iron, arsenical pyrites or mispickel, tin-white cobalt or smaltite, arsenical nickel, realgar, orpiment, pharmacolite and cobalt bloom, whilst it is also met with in small quantities in nearly all specimens of iron pyrites.

Synonyms:

mineral, atomic number 33, As, arsenic,

Antonyms:

organic,