Hawleyite
Orange-yellow earthy coating
General
Category	Sulfide mineral
Chemical formula	CdS
Identification
Color	Bright yellow
Crystal habit	Powdery massive
Crystal system	Cubic-hextetrahedral
Mohs scale hardness	2.5-3
Luster	Metallic
Streak	Light yellow
Specific gravity	4.87

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 and named in honour of mineralogist James Edwin Hawley, a professor at Queen's University in Ontario, Canada.

[edit] See also

• Cadmium sulfide
• List of minerals
• List of minerals named after people

[edit] References

• MinDAT
• Webmineral
• Handbook of Mineralogy

This article about a specific sulfide mineral is a stub. You can help Wikipedia by expanding it. v • d • e