Sonolite

Sonolite is named after its discovery locality, in the Sono manganese mine, Japan.

Sonolite forms transparent to translucent red-orange, reddish brown, pinkish brown to dark brown granular masses or prismatic to anhedral crystals up to 2.5 cm.

Sonolite is a very rare gem.
General Information
Chemical Formula
Mn
2+
9
(SiO
 
4
)
 
4
(OH,F)
 
2
Anthony et al, Handbook of mineralogy (2001)
Physical Properties of Sonolite
Mohs Hardness5.5
Anthony et al, Handbook of mineralogy (2001)
Specific Gravity3.82 to 4.00
Anthony et al, Handbook of mineralogy (2001)
Optical Properties of Sonolite
Refractive Index1.763 to 1.793
Anthony et al, Handbook of mineralogy (2001)
Optical CharacterBiaxial/-
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Brown, dark brown, reddish brown to reddish orange; colorless in thin section.
Anthony et al, Handbook of mineralogy (2001)
TransparencyTransparent
Anthony et al, Handbook of mineralogy (2001)
LustreVitreous,Dull (Earthy)
Anthony et al, Handbook of mineralogy (2001)
Crystallography of Sonolite
Crystal SystemMonoclinic
Anthony et al, Handbook of mineralogy (2001)
HabitCrystals prismatic to anhedral, to 2.5 cm; granular.
Anthony et al, Handbook of mineralogy (2001)
Geological Environment
Where found:In metamorphosed manganese-rich deposits.
Anthony et al, Handbook of mineralogy (2001)
Further Information
Mineral information:Sonolite information at mindat.org
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