Realgar

Formula	AsS
Origin	Jiepaiyu Mine (Shimen Mine; Realgar Mine), China
Description	Intense red coloured sinter from Realgar.
Classification (Lapis)	Sulfides
Crystal System	Monoclinic
Hardness	1,5 – 2,0
Colour	Red to yellow-orange; in polished section, pale gray, with abundant yellow to red internal reflections
Streak	Red-orange to red
Luminescence	none observed
Lustre	Resinous to greasy
Transparency (Opacity)	Transparent when fresh
Cleavage	Good
Fracture	conchoidal, splintery
Magnetism	no
Geological Setting	Most commonly as a low-temperature hydrothermal vein mineral associated with As–Sb minerals
Specific Gravity	3,9 g/cm3