Orange-yellow earthy coating
|Crystal class||Hextetrahedral (43m)
H-M symbol: (4 3m)
|Unit cell||a = 5.818 Å; Z = 4|
|Crystal habit||Powdery massive|
|Mohs scale hardness||2.5-3|
|Diaphaneity||Translucent to opaque|
Hawleyite is a rare sulfide mineral in the sphalerite group, dimorphous and easily confused with greenockite. Chemically, it is a cadmium sulfide, and occurs as a bright yellow coating on sphalerite or siderite in vugs, deposited by meteoric waters.
It was discovered in 1955 in the Hector-Calumet mine, Keno-Galena Hill area, Yukon Territory and named in honour of mineralogist James Edwin Hawley (1897–1965), a professor at Queen's University in Ontario, Canada.
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