Orpiment occurs naturally in volcanic fumaroles, hydrothermal veins, hot springs, and as a decomposition product of Realgar. Deposits are found in the Czech Republic, Romania (Copalnic), Germany (Andreas-Berg ), Switzerland (Valais), Turkey (Çölemerik), Macedonia, Japan and the United States (Utah, Nevada, Wyoming).

Where is realgar found in the world?

It occurs in association with orpiment, arsenolite, calcite and barite. It is found with lead, silver and gold ores in Hungary, Bohemia and Saxony. In the US it occurs notably in Mercur, Utah; Manhattan, Nevada; and in the geyser deposits of Yellowstone National Park.

What is orpiment used for today?

Contemporary uses

Orpiment is used in the production of infrared-transmitting glass, oil cloth, linoleum, semiconductors, photoconductors, pigments, and fireworks.