Meionite
A variety of Minerals
What is Meionite?
Meionite is a tectosilicate belonging to the scapolite group with the formula Ca4Al6Si6O24CO3. Some samples may also contain a sulfate group. It was first discovered in 1801 on Mt Somma, Vesuvius, Italy. It was named by Rene Just Haüy after μειωυ, the Greek word for less, in reference to the less acute pyramidal form as compared to Vesuvianite.
Optical Properties
- Refractive Index
- 1.556-1.600
- Birefringence
- 0.024-0.037
- Optical Character
- Uniaxial negative
Meionite Market Value Calculator
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Meionite Localities Map
See where Meionite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Colorless, white, grey, pink, violet, blue, yellow, orange-brown, brown
- Hardness (Mohs)
- 5 - 6
- Density
- 2.86 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Ca4Al6Si6O24CO3
- Elements
- Al, C, Ca, Cl, Na, O, S, Si
Also Known As
MeioniteMeyonite
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