Orpimento

italian term for this mineral

Structural context

Orpiment
Crystal System monoclinicSpace Group P21/c

Chemical context

Stoichiometric formulas

Orpiment
mindat.org
  • March 13, 2023As2S3
IMA
  • March 13, 2023As2S3
mineralogy.rocks
  • Aug. 30, 2022As3+2S2-3

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • orange-yellow
  • lemon-yellow
Color noteOriginal color note from the source
Orange-yellow to lemon-yellow
StreakStreak entities, recognized using a custom trained NER model
  • light lemon yellow
Streak noteOriginal streak note from the source
Light lemon yellow
Lustre
Pearly
Transparency
Transparent
Luminescence
None
Tenacity
sectile
Hardness
1.5—2
Calculated density
3.48