mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mineralpedia Details for Thomsonite-Ca

Reset

Thomsonite-Ca

Thomsonite-Ca

Named for the Scottish chemist and mineralogist Dr. Thomas Thomson, who first described and analyzed the mineral. Also called Thomsonite-Ca, Thomsonite has a strontium-rich analogue called Thomsonite-Sr. Thomsonite is a common zeolite found in many localities within fractures in igneous rocks, typically basalts as well as in contact metamorphosed rocks, alkalic igneous rocks, subvolcanic rocks, and occasionally as a cement on sandstones. Thomsonite is pyroelectric, meaning it can generate a charge temporarily when heated.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/thomsonite.pdf

Formula
NaCa2(Al5Si5)O20ยท6H2
Crystal System
Orthorhombic 
Crystal Habit
Radial, Fibrous, Spherical 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, greenish, yellow, white, pink 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
5-5.5 
WebMineral
View Thomsonite-Ca 
Mindat
View Thomsonite-Ca 

Thomsonite-Ca from George Washington Bridge, Fort Lee, Bergen Co., New Jersey, United States

Thomsonite-Ca
            from George Washington Bridge, Fort Lee, Bergen Co., New Jersey, United States

Tight radial white sprays to 1.5cm with concentric black bands.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2020 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map