Seamanite
A variety of Minerals
What is Seamanite?
Seamanite is a transparent, yellow to pink mineral that occurs as needle-shaped crystals. Seamanite is a brittle mineral with a mohs hardness of 4. It is found in the crevices of fractured siliceous rock. The type occurrence was found in association with small crystals of calcite, thin coatings of manganese oxide, and fibrous sussexite. Seamanite has also been found with shigaite.
Seamanite Market Value Calculator
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Seamanite Localities Map
See where Seamanite 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
- Yellow, pink, yellow-brown; colourless in transmitted light
- Hardness (Mohs)
- 4
- Density
- 3.13 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Mn2+3B(OH)4(OH)2
- Elements
- B, H, Mn, O, P
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