Rectangular Carletonite Crystal
SILICATES; PHYLLOSILICATES · TETRAGONAL

Carletonite

KNa4Ca4Si8O18(CO3)4(OH,F) · (H2O)

Hardness
4–4.5
Streak
White
Spec. Gravity
2.4–2.5
System
Tetragonal

About

Carletonite is a rare blue mineral that is very similar to Apophyllite, and often classified as a member of the Apophyllite group. It is usually multicolored with blue and white zones, and the blue can be a very intense shade. Carletonite was named after Carleton University in Ottawa, Ontario, where this mineral was first recognized.

Crystal Forms & Aggregates

Striking Features

Environment

Uses

Carletonite is rare collectors mineral, and is especially represented by Mont Saint Hiliaire collectors as well as thumbnail collectors.

Noteworthy Localities

Carletonite is currently found in only one locality in the world - in the Poudrette quarry in Mt. Saint Hilaire, Quebec, Canada.

Common Mineral Associations

Distinguishing Similar Minerals

Halite - Has salty taste, occurs in different mineral environment.
Cordierite - Occurs in different environment.

Photos