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  Home  >>  Mineral Encyclopedia  >>  Mineral Photos  >>  Sepiolite-Sepiolite
Sepiolite
Chemical
Formula
 Mg4Si6O15(OH)2·6H2O
Species
 Silicates
Crystal
System
 Orthorhombic
Mohs
Scale
 2
Specific
Gravity
 2
Color
 Grayish white, white, white with a yellowish or reddish tinge; bluish green
Streak
 White
Luster
 Dull, Earthy
Refractive
Index
 n = 1.520 n = 1.520 n = 1.530
Diaphaneity
 Opaque
Crystal Habit：Compact nodular, earthy, clayey, massive; rarely fine fibrous along
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