Milky quartz
Variety SiO2
Also called Snow quartz and Bull quartz
About it
White, cloudy quartz made milky by countless tiny bubbles of fluid. The commonest kind of quartz, it fills veins worldwide, and such veins are where many prospectors look for gold.
- Type
- Variety
- Group
- Quartz variety
- Formula
- SiO2
- Hardness (Mohs)
- 7
- Specific gravity
- 2.65–2.66
- Streak
- white
- Lustre
- vitreous (glassy), greasy
- Crystal system
- Trigonal
- Colours
- white, milky white
- Transparency
- translucent, opaque
- Cleavage and fracture
- none; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.