Cinnabarite
Chemical Formula	HgS
Species	Sulfides
Crystal System	Trigonal
Mohs Scale	2-2.5
Specific Gravity	8.176
Color	Cochineal-red, towards brownish red and lead-gray
Streak	Scarlet
Luster	Adamantine to dull
Refractive Index	nω = 2.905 nε = 3.256
Diaphaneity	Transparent in thin pieces
Cleavage	Prismatic , perfect
Fracture	Uneven to subconchoidal
Crystal Habit：Rhombohedral to tabular; granular to massive and as incrustations