Mesolite
Chemical Formula	Na2Ca2(Al2Si3O10)3·8H2O
Species	Silicates
Crystal System	Orthorhombic
Mohs Scale	5
Specific Gravity	2.26
Color	Colorless, white, gray, yellowish
Streak	White
Luster	Vitreous
Refractive Index	n = 1.505 n = 1.505 n = 1.505
Diaphaneity	Transparent, Translucent, Opaque
Cleavage	PerfectPerfect on
Fracture	Irregular/Uneven
Crystal Habit：As elongated prismatic crystals, commonly in hairlike tufts and aggregates of fibers; radiating compact masses; stalactitic; porcelaneous
Geological Setting：In cavities in basalts.