David K. Joyce

Mont Saint-Hilaire, Yofortierite

This is one of the more rare minerals at Mont Saint-Hilaire. These specimens all show rich amounts of very fine, acicular matts of yofortierite in cavities in pegmatite. Excellent!

All prices in Canadian dollars. For payment in US$, deduct 18% or multiply by 0.82.

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YofortieriteMont Saint-Hilaire, Yofortierite
  • Item #23006
  • Yofortierite
  • 3.2x2.8x1.8 cm
  • Largest Crystal Size: 1mm
  • $65.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • Lots of sprays of pinkish yofortierite fibers/crystals are exposed here and there all over this specimen. Lots to look at! Excellent!
Yofortierite, Epididymite, Mont Saint-Hilaire, Yofortierite
  • Item #26232
  • Yofortierite, Epididymite,
  • 4.8x3.0x4.3 cm
  • Largest Crystal Size: y-6mm, ep-0.5mm
  • $75.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • Lots of minerals in thie vuggy matrix of altered pegmatite. The specimen features one larger vug that has a rich partial filling of reddish yofortierite with twinned, sixlings of colourless epididymite suspended in the yofrtierite crystals. Throughout the specimen are vugs of bladed albite, aegirine crystals and some other minerals. Many crystal sections of a eudialyte group mineral are embedded in the matrix, as well.
Yofortierite. NenadkevichiteMont Saint-Hilaire, Yofortierite
  • Item #26234
  • Yofortierite. Nenadkevichite
  • 5.6x3.8x3.4 cm
  • Largest Crystal Size: 9mm
  • $75.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • A couple of rich areas of radiating, deep red yofortierite crystals. Excellent for this mineral! As well there are other interesting cavities in this altered pegmatite matrix including one with excellent, tabular nenadkevichite crystals.
YofortieriteMont Saint-Hilaire, Yofortierite
  • Item #26243
  • Yofortierite
  • 4.8x2.6x2.1 cm
  • Largest Crystal Size: 3mm
  • $45.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • A couple of openings in this altered pegmatite are loaded with divergent, reddish crystals of yofortierite. One seems to have a darker inner phase that reverts to yofortierite. Nice from the type locality.
YofortieriteMont Saint-Hilaire, Yofortierite
  • Item #26245
  • Yofortierite
  • 5.4x2.7x2.3 cm
  • Largest Crystal Size: 3mm
  • $55.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • Cavity fillings of reddish yofortierite crystals are present in several areas of this altered pegmatite matrix. Rich specimen from the type locality!