Chabazite-Ca – [CaAl2Si4O12 · 6H2O]

Chabazite-Ca is a very rare accessory mineral at Mont Saint-Hilaire. Formerly known as chabazite, the species has been recently analyzed as Chabazite-Ca according to the latest recommendations for zeolites from the International Mineralogical Association.



  • Color is usually colorless, white or tan.
  • Luster is vitreous to dull to pearly.
  • Diaphaneity is transparent to translucent to opaque.
  • Crystal System is triclinic; R3m.
  • Crystal Habits include rounded hexagonal plates, flakes, rosettes
    and spherical aggregates of flakes; six-pointed stellate crystals
    or groups.
  • Cleavage {101} is distinct.
  • Fracture is uneven.
  • Hardness is 4 – 5.
  • Specific Gravity is approximately 2.0 g/cm3.
  • Streak is white.
  • Associated Minerals include aegirine, albite, analcime,
    microcline and natrolite.
  • Distinguishing Features: crystal habit.
  • Origin: Named in 1792 from the Greek chabazios, tune or melody,
    one of twenty stones named in the poem Peri lithos, which
    extolled the virtues of minerals.



Dana class # 77.1.2a.1 – Tectosilicates; zeolites; zeolite group
Strunz class # VIII/J.26-30 – Silicates; tectosilicates (network), with zeolite-structure, bladed zeolites; zeolite group, willhendersonite – chabazite – perialite series