Acuminite
A variety of Minerals
What is Acuminite?
Acuminite is a rare halide mineral of with chemical formula: SrAlF4(OH)·(H2O). Its name comes from the Latin word acumen, meaning "spear point". Its Mohs scale rating is 3.5. Acumenite has only been described from its type locality of the cryolite deposit in Ivigtut, Greenland.
Acuminite Market Value Calculator
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Acuminite Localities Map
See where Acuminite 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
- Colourless, white, becomes yellow on exposure to x-rays
- Hardness (Mohs)
- 3.5
- Density
- 3.305 g/cm³
- Streak
- white
Chemical Properties
- Chemical Formula
- Sr[AlF4(OH)(H2O)]
- Elements
- Al, F, H, O, Sr
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