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Marinellite with Sanidine

#BW59000

Marinellite with Sanidine

#BW59000
Availability
Sold
Size
2 x 2 x 1 cm - Thumbnail 
Formula
Na42Ca6Al36Si36O144(SO4)8Cl2·6H2O (RRUFF)
Locality
Magliano Romano, Rome Capital, Lazio, Italy

Light blue translucent crystal grains from 2 to 4mm in matrix with some biotite and other minerals. Marinellite is a Cancrinite group minerals, which are silica deficient. It is formed as ejected volcanic rock. It is a rich specimen and this locality is one of three worldwide.

Marinellite

Formula
Na42Ca6Al36Si36O144(SO4)8Cl2·6H2
Crystal System
Trigonal 
Crystal Habit
Anhedral Grains 
Cleavage
Poor, None, None 
Luster
Vitreous (Glassy) 
Color
colorless 
Streak
white 
Class
Trigonal 
Fracture
Brittle - Conchoidal 
Hardness
5.5 

Data courtesy of Webmineral.

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