Ussingite is a mineral found mainly in the form of continuous masses. Crystals are rare: 1...5mm, maximum 1cm.
You can see ussingite stone for sale and buy it in the Minerals of Russia online store.
General | |
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Category | Phyllosilicate minerals |
Formula (repeating unit) |
Na2AlSi3O8OH |
IMA symbol | Usg |
Strunz classification | 9.EH.20 |
Crystal system | Triclinic |
Crystal class | Pinacoidal (1) (same H-M symbol) |
Space group | P1 |
Identification | |
Color | pale to medium violet, reddish violet; sometimes barely tinted purple |
Fracture | irregular/ uneven |
Tenacity | brittle |
Mohs scale hardness | 6-7 |
Luster | sub-vitreous |
Streak | white |
Diaphaneity | transparent, translucent |