David K. Joyce

Mont Saint-Hilaire, Cappelinite-(Y), Niobokupletskite

Rarely, cappelinite-(Y) is found at Mont Saint-Hilaire in tiny radiating aggregates of crystals that look like smooth hemispheres. In cross section, you can easily see the radiating structure. Often, the cappelinite is associated with niobokupletskite in divergent crystal sprays. Here are some very good examples!

All prices in Canadian dollars. For payment in US$, deduct 21% or multiply by 0.79.

Click on any of the following thumbnails to view a larger image of the specimen.

Cappelinite-(Y), NiobokupletskiteMont Saint-Hilaire, Cappelinite-(Y), Niobokupletskite
  • Item #24085
  • Cappelinite-(Y), Niobokupletskite
  • 2.7x2.3x1.7 cm
  • Largest Crystal Size: micro
  • $65.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • There is a hemispherical, radiating aggregate of light mauve cappelinite crystals in a cavity on this specimen. As well, in other cavities there are sprays of light-brown niobokupletskite. The cappelinite is very small and difficult for me to photograph with my equipment but probably easier for you!? Rare!
Cappelinite-(Y), NiobokupletskiteMont Saint-Hilaire, Cappelinite-(Y), Niobokupletskite
  • Item #24089
  • Cappelinite-(Y), Niobokupletskite
  • 3.8x2.6x2.0 cm
  • Largest Crystal Size: micro
  • $75.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • A very nice, mauve, hemispherical aggregate of cappelinite crystals speared by aegirine crystals in corroded catapleiite. As well, in other openings in the specimen, there are some nice niobokupletskite crystals. Rare!
Cappelinite-(Y), NiobokupletskiteMont Saint-Hilaire, Cappelinite-(Y), Niobokupletskite
  • Item #24091
  • Cappelinite-(Y), Niobokupletskite
  • 3.1x2.3x1.8 cm
  • Largest Crystal Size: micro
  • $85.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • This analcime-microcline matrix has a cavity in rotten catapleiite that contains a nice, light mauve hemisphere of cappelinite. There is niobokupletskite elsewhere in the specimen. Nice specimen of this rare, Yttrium dominant rare earth mineral!