Greenockite
Mineral CdS
Take care.
- Toxic: Wash your hands after handling it, don't lick or taste it, and don't make dust.
About it
Usually a bright yellow powdery coating on sphalerite and other zinc ores; crystals are rare. Named for Lord Greenock; first found at Bishopton, Scotland, while a railway tunnel was dug.
- Type
- Mineral
- Group
- Sulfide, wurtzite group
- Formula
- CdS
- Hardness (Mohs)
- 3–3.5
- Specific gravity
- 4.8–4.9
- Streak
- orange-yellow to brick red
- Lustre
- adamantine (diamond-like), resinous
- Crystal system
- Hexagonal
- Colours
- yellow, orange, red
- Transparency
- transparent, translucent
- Cleavage and fracture
- distinct prismatic; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.