Zunyite
Mineral Al13Si5O20(OH,F)18Cl
About it
Sharp little tetrahedra, white to flesh pink, in strongly altered volcanic rock; named for the Zuñi mine, Colorado, with larger crystals from the Dome Rock Mountains, Arizona.
- Type
- Mineral
- Group
- Silicate (sorosilicate)
- Formula
- Al13Si5O20(OH,F)18Cl
- Hardness (Mohs)
- 7
- Specific gravity
- 2.87–2.9
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Isometric (cubic)
- Colours
- greyish white, flesh pink, colourless
- Transparency
- transparent, translucent
- Cleavage and fracture
- good octahedral
- Under UV light
- sometimes red under UV
Typical values: real specimens vary. For more, see mindat.org.