Greenockite
Chemical Formula	CdS
Species	Sulfides
Crystal System	Hexagonal
Mohs Scale	3
Specific Gravity	4.8-4.9
Color	Honey yellow, citron yellow, orange yellow
Streak	Yellow orange to brick red
Luster	Adamantine, Resinous
Refractive Index	n = 2.529 n = 2.506
Diaphaneity	Translucent
Cleavage	Distinct/GoodDistinct on , imperfect on .
Fracture	Conchoidal
Crystal Habit：Colloform - forming from a gel or colloidal mass; encrustations - forms crust-like aggregates on matrix; radial - crystals radiate from a center without producing stellar forms (e.g. stibnite)
Geological Setting：An uncommon mineral of sulfide deposits.