Mineralpedia Details for Natrolite
Named for the Greek for “sodium,” natrio, in reference to the mineral’s sodium content, and for “stone,” lithos. Natrolite is a common mineral that occurs in cavities in basalts and other igneous rocks as one of the last minerals to forms, and also occurs as a filling in seams in granites, gneisses, and syenites. Associated minerals include zeolites, calcite, nepheline, sodalite, and quartz. Natrolite hundreds of known localities including in Germany, France, England, Ireland, Norway, Russia, the United States, and Canada. Natrolite is pyroelectric and piezoelectric, and will generate a charge in response to temperature and pressure changes, respectively. It will commonly fluoresce an orange to yellow under ultraviolet light.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/natrolite.pdf
- Crystal System
- Crystal Habit
- Acicular, Prismatic, Nodular
- Perfect, Imperfect, None
- Vitreous - Silky
- white, colorless, red, yellowish white, reddish white
- Orthorhombic - Pyramidal
- View Natrolite
- View Natrolite
Natrolite from Gratiot Mine, Keweenaw Co., Michigan, United States
Clear with tints of orange, bladed Natrolite crystals in fan-like sprays.
Natrolite from Bergen Hill, Paterson, New Jersey, United States
Colorless prismatic crysals from 3-15mm showing good terminations.
Natrolite from Somma-Vesuvius Complex, Naples, Campania, Italy
Creamy white prismatic crystals to 8mm in vug. Note the old tag in the prov. tab from the University of Amsterdam.
Natrolite from Big Rock quarry, Little Rock, Pulaski Co., Arkansas, United States
Excellent for this mine with colorless Natrolite crystals to 1.5cm.