Serandite
Mineral NaMn2Si3O8(OH)
About it
Salmon-pink to orange blades and prisms, the finest from Mont Saint-Hilaire, Quebec, often with white analcime; also from the Kola Peninsula, Russia.
- Type
- Mineral
- Group
- Silicate (inosilicate), wollastonite group
- Formula
- NaMn2Si3O8(OH)
- Hardness (Mohs)
- 4.5–5.5
- Specific gravity
- 3.32–3.42
- Streak
- white
- Lustre
- vitreous (glassy), greasy
- Crystal system
- Triclinic
- Colours
- salmon pink, orange, rose red, brown
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in two directions
Typical values: real specimens vary. For more, see mindat.org.