Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
tetragonalrareSilicates
Carletonite
KNa₄Ca₄Si₈O₁₈(CO₃)₄(F,OH)·H₂O
This specimen displays blocky, tabular crystals of a striking violet-blue color, often intergrown with other minerals or within a lighter matrix.
Carletonite Physical Properties
Mohs Hardness
4.5Crystal System
tetragonalLuster
vitreousStreak Color
whiteCleavage
perfect on {001}Fracture
unevenSpecific Gravity
2.5Colors
blue, violet-blue, light blue, white, colorlessTransparency
transparentType Locality
Poudrette quarry, Mont Saint-Hilaire, Rouville RCM, Montérégie, Quebec, CanadaMineral Group
SilicatesUses
collectorAssociated Minerals
aegirine, analcime, calcite, eudialyte, natrolite, serandite, sodalite, villiaumiteRarity
rareGeological Context
Carletonite is a rare mineral found in nepheline syenite pegmatites and miarolitic cavities within alkaline intrusive complexes, typically forming under late-stage hydrothermal conditions.
