David K. Joyce Minerals

Mont Saint- Hilaire, Pseudomorphs

Mont Saint Hilaire was a geological/mineralogical stew-pot with many mineralizing phases overlapping with each other. There is a treasure trove of pseudomorphic evidence of this activity! Here are some superb examples of some of the pseudomorphs that can be found at Mont Saint-Hilaire.

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

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

Calcite ps ShortiteMont Saint- Hilaire, Pseudomorphs
  • Item #8819
  • Calcite ps Shortite
  • 3.6x2.1x1.3 cm
  • Largest Crystal Size: 18mm
  • $50.00
  • Mont Saint-Hilaire

  • Canada
  • A fairly sharp pseudomorph of calcite after shortite is perched at the end of a different, elingate unknown pseudomorph.
Rhodochrosite, ps EudialyteMont Saint- Hilaire, Pseudomorphs
  • Item #14650
  • Rhodochrosite, ps Eudialyte
  • 2.9x2.4x1.8 cm
  • Largest Crystal Size: 6mm
  • $30.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • Several sharp, pseudo-octahedra of pinkish rhodochrosite after a eudialyte group mineral on this piece. Mostly associated with sharp analcime and albite crystals.
Rhodochrosite, ps EudialyteMont Saint- Hilaire, Pseudomorphs
  • Item #14664
  • Rhodochrosite, ps Eudialyte
  • 1.4x1.3x0.8 cm
  • Largest Crystal Size: 6mm
  • $30.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • A cluster of sharp pseudo's of rhodochrosite after eudialyte group mineral that are partially coated with decomposed pegmatite mineralization. Sharp!
Rhodochrosite, ps EudialyteMont Saint- Hilaire, Pseudomorphs
  • Item #14762
  • Rhodochrosite, ps Eudialyte
  • 5.2x4.0x2.8 cm
  • Largest Crystal Size: 10mm
  • $35.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • Several sharp pseudomorphes of rhodochrosite after a eudialyte group mineral are present on this deteriorated pegmatite. Sharp!
Rhodochrosite ps Serandite, Rhodochrosite.Mont Saint- Hilaire, Pseudomorphs
  • Item #16854
  • Rhodochrosite ps Serandite, Rhodochrosite.
  • 4.6x3.5x4.0 cm
  • Largest Crystal Size: 20mm
  • $120.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • This specimen shows a very well formed former serandite crystal, replaced by rhodochrosite, with an overgrowth veneer of small oriented rhodochrosite crystals. The rest of the specimen is made up of larger, pale pink rhodochrosite crystals, albite and aegirine crystals. Nice!
Catapleiite, ps Sodalite, ManganeptuniteMont Saint- Hilaire, Pseudomorphs
  • Item #16862
  • Catapleiite, ps Sodalite, Manganeptunite
  • 2.6x1.8x1.8 cm
  • Largest Crystal Size: as above
  • $110.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • THIS is a great pseudomorph! Former dodecahedral sodalite crystals have been totally replaced by a tight, reticulated network of catapleiite crystals. The dodecahedral shape of the isometric crystals is preserved very well! To top it off there are a couple of nice manganeptunite crystals on the specimen.
Ankerite ps. sodaliteMont Saint- Hilaire, Pseudomorphs
  • Item #16867
  • Ankerite ps. sodalite
  • 5.1x3.7x3.2 cm
  • Largest Crystal Size: 20mm
  • $65.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • There are two sharp pseudomorphs of ankerite after sodalite on this specimen. The one on the top of the specimen is a complete, well formed dodecahedron. The one on the right that is a more complex isometric form combination is only partially visible. The rest of the piece is composed of rounded aggregates of ankerite or siderite crystals. Interestingly, on the back of the piece, you can look into the bigger pseudomorph. It is hollow! Displays well.
Analcime, ps Cancrinite, fluoriteMont Saint- Hilaire, Pseudomorphs
  • Item #16865
  • Analcime, ps Cancrinite, fluorite
  • 3.6x2.0x1.9 cm
  • Largest Crystal Size: 26mm
  • $45.00
  • Mont Saint-Hilaire
  • Monteregie
    Quebec, Canada
  • Two very sharp pseudomorphs of analcime after cancrinite are joined in an interesting way. The crystal faces of the cancrinite are very sharp! A druse of tiny purple fluorite crystals cover the pseudo's here and there. Looks great!