Revision as of 13:27, 17 October 2022 by MDerrick (talk | contribs)
Jump to navigation Jump to search


An orange-yellow arsenic sulfide mineral that can occur as a light induced alteration product of realgar. Pararealgar has been found in association with realgar in occasional classical and European paintings.

Synonyms and Related Terms

arsenic sulfide


  • Highly toxic by ingestion and inhalation.
  • Carcinogen and mutagen

Physical and Chemical Properties

  • Monoclinic, yellow, prismatic crystals.
  • Fracture=brittle and uneven
  • Luster=vitreous to resinous.
  • Pigment particles are irregular with high relief.
Composition AsS
Mohs Hardness 1.0-1.5
Density 3.52 g/ml
Molecular Weight 106.99
Refractive Index >2.02

Resources and Citations

  • K. Trentelman, L. Stodulski, M. Pavlosky, 'Characterization of pararealgar and other light-induced transformation products from realgar by Raman microspectroscopy' Analytical Chemistry 68 (1996) 1755-1761.
  • Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004

Retrieved from ""