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Mesolite

Named after the Greek word meso, meaning “middle,” in reference to the composition of Mesolite being that of an intermediate between natrolite and scolecite. Mesolite has many localities but only a few have large crystal specimens or large masses. Some of the best localities for Mesolite are in Canada, the United States, France, Iceland, and India. It occurs in volcanic rock cavities, typically found in basalt but also in andesite, porphyrite, and hydrothermal veins. Mesolite is piezoelectric, generates a charge in response to pressure, and can be slightly pyroelectric, generates a charge in response to heat.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/mesolite.pdf
- Formula
- Na2Ca2(Si9Al6)O30·8H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Acicular, Capillary, Spherical
- Cleavage
- Perfect, Perfect, None
- Luster
- Vitreous - Silky
- Color
- white, gray, pale yellow
- Streak
- white
- Class
- Monoclinic - Sphenoidal
- Fracture
- Uneven
- Hardness
- 5
- WebMineral
- View Mesolite
- Mindat
- View Mesolite
Mesolite from Burnt Cabin Creek, Spray, Wheeler Co., Oregon, United States

Snow white acicular sprays to 7mm across lining large vug.
Mesolite from Poonah dist., Maharashtra, India

Thin prismatic, clear crystals to 2.5cm divergent and radiating from white Laumontite matrix.
Mesolite from Ritter, Grant Co., Oregon, United States

This will be difficult to ship but we can do it. long acicular crystals of Mesolite to 1.7mm on basalt matrix.