This is a pair of dodecahedral hackmanite crystals, coated with a veneer of albite crystals and associated with calcite. The dodecahedral crystal forms are distinct underneath the albite. In excellent condition – no damage. A pretty specimen from this find.
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About these Specimens of Sodalite var. Hackmanite
Although sodalite is a relatively common mineral at Mont Saint-Hilaire, well-formed crystals are quite rare. These specimens are from a pocket collected by Gilles Haineault in 1994. The specimens from this pocket are entirely distinctive, as the hackmanite crystals are coated with albite crystals.