Mesolite
Mesolite
Published: June 2014
Modified: October 2021
Mesolite is a zeolite mineral that occurs in delicate, needle-like crystal structures that radiate from its base. Prized by collectors for its striking crystal formation, mesolite is typically white or colorless, but occasionally light yellow in color. Large specimens are very rare, and faceted gems are almost non-existent.
General Information
Common Name
Mesolite
Species
Mesolite
Transparency
Transparent - Opaque
Dispersion
Strength: strong fire
Refractive Index
1.504-1.508
Birefringence
0.001
Optic Character
Biaxial
Optic Sign
Positive
Polariscope Reaction
Aggregate (AGG), Doubly Refractive (DR)
Fluorescence
SWUV: Inert
LWUV: Inert
LWUV: Inert
Pleochroism
Unobservable
Hardness
5-5.5
Streak
White
Specific Gravity
2.260-2.400 Typical: 2.26
Inclusions
Mesolite has clusters of radiating needle like crystals and is silky in appearance if fibrous.
Luster
Silky, Vitreous
Fracture
Uneven
Cleavage
Perfect, in two directions
Chemical Formula
Na2Ca2Si9Al6O30.8H2O
Crystal System
Orthorhombic
Chemistry Classification
Silicate
Mesolite Colors
-
Colorless -
Gray -
White -
Yellow
Countries of Origin
Unknown