Acicular Natrolit from India
Natrolite is a tectosilicate mineral species belonging to the zeolite group.
Formula: Na2Al2Si3O10 · 2H2O
System: Orthorhombic
Colour: White, Colorless, Red, ...
Hardness: 5 - 5½
Member of: Zeolite Group
Needle stone or needle-zeolite are other informal names, alluding to the common acicular habit of the crystals.
From Nasik District, Maharashtra, India
Formula: Na2Al2Si3O10 · 2H2O
System: Orthorhombic
Colour: White, Colorless, Red, ...
Hardness: 5 - 5½
Member of: Zeolite Group
Needle stone or needle-zeolite are other informal names, alluding to the common acicular habit of the crystals.
From Nasik District, Maharashtra, India