Mordenite
Chemical Formula	Ca，Na2，K2Al2Si10O24·7H2O
Species	Silicates
Crystal System	Orthorhombic
Mohs Scale	3-4
Specific Gravity	2.125
Color	Colourless, white, yellowish, pinkish
Streak	White
Luster	Vitreous, Silky
Refractive Index	n = 1.472 - 1.483 n = 1.475 - 1.485 n = 1.477 - 1.487
Diaphaneity	Transparent, Translucent
Cleavage	Perfectperfect on distinct on
Fracture	Irregular/Uneven
Crystal Habit：Prismatic crystals, acicular to fine fibrous, radiating groups, cottony aggregates, compact, porcelaneous.
Geological Setting：Veins and amygdaloids in igneous rocks.