Image: <a rel="nofollow" class="external text" href="http://www.mindat.org/user-11235.html#0">Modris Baum</a> (Public domain)
trigonaluncommonSilicates (Zeolite Group)
Chabazite-Ca
CaAl2Si4O12 · 6H2O
The image displays small, yellowish-brown rosettes of chabazite-Ca crystals, resembling honeycomb, nestled on a darker matrix. These well-formed crystals exhibit a vitreous luster.
Chabazite-Ca Physical Properties
Mohs Hardness
4.5Crystal System
trigonalLuster
vitreousStreak Color
whiteCleavage
distinct on {1011}Fracture
uneven to conchoidalSpecific Gravity
2.1Colors
yellowish-brown, white, colorless, pink, red, brownTransparency
transparent to translucentType Locality
Poudrette quarry, Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, CanadaMineral Group
Silicates (Zeolite Group)Uses
collector, scientific researchAssociated Minerals
other zeolites, apophyllite, calcite, quartz, nepheline, sodaliteRarity
uncommonGeological Context
Chabazite-Ca is a zeolite mineral that typically forms in the vesicles and cavities of basaltic volcanic rocks, as well as in some alkaline igneous intrusions like Mont Saint-Hilaire. It crystallizes from the alteration of volcanic glass or other primary minerals by low-temperature hydrothermal fluids.
