Morion
Variety SiO2
Take care.
- Sensitive to heat: Keep it away from heat and sudden changes of temperature, including hot lights and ultrasonic cleaners.
About it
The darkest smoky quartz, so dark it looks opaque black until held to a bright light. Found in granite pegmatites in Ukraine, Brazil, and elsewhere; many black quartz crystals sold are artificially irradiated.
- Type
- Variety
- Group
- Quartz variety
- Formula
- SiO2
- Hardness (Mohs)
- 7
- Specific gravity
- 2.65–2.66
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Trigonal
- Colours
- black, very dark brown
- Transparency
- opaque, translucent
- Cleavage and fracture
- none; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.