Dims: 2.2 x 0.8 x 0.7" (5.6 x 2.0 x 1.8 cm)
Wt: 12.5 g
Mount Saint Hilaire, Quebec, Canada
Two discernable Aegirine crystals intersect with the natrolite base of this specimen. The smaller of the two is mostly incomplete, but the larger is complete and measures 0.8" (2.0 cm) in length. It is in very good condition, showing only a small amount of damage on its termination tip that is not at all obvious. The crystal has very good monoclinic prismatic form, with slightly disseminated but well-defined edges and clean faces that possess a vitreous luster. It has a basic black coloration and is completely opaque. Accompanying the Aegirines are several tiny, red rhombohedral crystals- they could be chabazite or calcite, but I would guess chabazite, due to the zeolitic base, their deep rust-red color and the fact that this locality produces chabazite. The natrolite base on which they rest impresses me greatly, as it consists of the bottom portion of a very large crystal, with an intact base (or maybe it is a termination??). A much smaller, broken natrolite intersects it near the broken Aegirine, but there is no host rock present.