Realgar
Real mineral · uncommon · As₄S₄
Arsenic sulfide deposited around hot springs and volcanic vents. Converts slowly to orpiment and arsenolite on prolonged light exposure. Both realgar and orpiment are toxic and require careful handling.
Identity
- Formula
- As₄S₄
- Chemical class
- sulfide
- Also known as
- Ruby sulfur, Ruby of arsenic
Crystallography
- Crystal system
- monoclinic
- Habits
- prismatic, massive, granular
- Fracture
- conchoidal
Physical properties
- Mohs hardness
- 1.5
- Density
- 3.56 g/cm³
- Luster
- resinous, adamantine
- Colors
- red, orange-red, orange
- Streak
- orange-yellow
- Transparency
- transparent, translucent
Geology
- Origins
- volcanic, hydrothermal
- Host rocks
- volcanic deposits, limestone, dolomite
- Associated minerals
- Orpiment, Stibnite, Calcite, Pyrite
- Geography
- Romania, China, USA (Nevada), Peru, Hungary
Classification
- Rarity
- uncommon
- Gem quality
- No
Arcane properties
- Affinity
- fire, death
- Effects
- elemental fire, warding
- Planar origin
- Material Plane
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