Template:Larimar

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Larimar
Chemical composition NaCa2Si3O8(OH)
Crystal system triclinic
Habit aggregate
Hardness 5
Optic nature biaxial +
Refractive index 1.59 - 1.63
Birefringence 0.028-0.038
Dispersion very weak
Specific gravity 2.62 - 2.87
Lustre silky
Fluorescence yellow or orange (SW-UV)