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Dominant species
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Nacrite
Chemical
Formula
Al2Si2O5OH4
Species
Silicates
Crystal
System
Monoclinic
Mohs
Scale
2
Color
White, grey, yellowish, brownish, etc.
Streak
White
Luster
Pearly
Refractive
Index
n = 1.557 n = 1.562 n = 1.563
Nacrite1941
Nacrite1941
Nacrite1937
Nacrite1937
Nacrite1935
Nacrite1935
Nacrite1932
Nacrite1932
Nacrite1930
Nacrite1930
Nacrite1928
Nacrite1928
Nacrite1925
Nacrite1925
Nacrite1923
Nacrite1923
Nacrite1921
Nacrite1921