Kernite
Mineral Na2B4O6(OH)2·3H2O
Also called Rasorite
Take care.
- Damaged by water: Keep it dry: don't wash it, and keep it out of damp places.
About it
Large colourless masses that split into long splinters along two perfect cleavages, and slowly whiten on the surface in air. Mined as a boron ore at Boron, California, where it was first found.
- Type
- Mineral
- Group
- Borate
- Formula
- Na2B4O6(OH)2·3H2O
- Hardness (Mohs)
- 2.5–3
- Specific gravity
- 1.91–1.92
- Streak
- white
- Lustre
- vitreous (glassy), pearly, silky
- Crystal system
- Monoclinic
- Colours
- colourless, white
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in two directions; splits into long splinters
Typical values: real specimens vary. For more, see mindat.org.