A Geoscience Digital Image Library

TitleOrpiment and realgar from California
DescriptionOrpiment (yellow), As2S3 (arsenic sulfide), is a rare mineral that usually forms with realgar (pink), AsS (arsenic sulfide). In the past, these minerals have been major ores of arsenic. Arsenic is not in high demand today but was formerly used for pigments, as a firework coloring agent and for several other purposes.
LocationUSA ▹ California
PhotographerNessa Eull. 2001-07-17.
CollectionUniversity of North Dakota Mineralogy Collection #88.
Key wordsorpiment, realgar, California
Tech details695 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1225