David K. Joyce

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
  • $35.00
  • Mont Saint-Hilaire

  • Canada
  • A fairly sharp pseudomorph of calcite after shortite is perched at the end of a different, elingate unknown pseudomorph.
Siderite ps Fluorite, ElpiditeMont Saint- Hilaire, Pseudomorphs
  • Item #12877
  • Siderite ps Fluorite, Elpidite
  • 2.9x2.8x2.5 cm
  • Largest Crystal Size: 21mm on edge
  • $45.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • This specimen shows two of the octahedral, possibly in parallel growth or possible one an offset of the main crystal. sharp and well preserved octahedral form.
Albite ps Cancrinite, BrookiteMont Saint- Hilaire, Pseudomorphs
  • Item #14519
  • Albite ps Cancrinite, Brookite
  • 4.4x2.6x2.6 cm
  • Largest Crystal Size: p-14mm, b-1mm
  • $35.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • This specimen appears to be mostly composed of albite, preserving a cancrinite crystal. The whole crystallized parts of the piece are sprinkled with tiny brookite crystals.
Natrolite, calcite ps ?Mont Saint- Hilaire, Pseudomorphs
  • Item #11557
  • Natrolite, calcite ps ?
  • 4.1x4.0x3.7 cm
  • Largest Crystal Size: as above.
  • $45.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • A very nice pseudomorph consisting of a natrolite shel with a filling of very yellow interlocking crystals of calcite. The questionmark is there because there is no current mineral that forms in crystals of this shape at MSH. We're not sure what it was originally! Very good!
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!
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!
Calcite, ps Shortite, Albite ps Aegirine. Mont Saint- Hilaire, Pseudomorphs
  • Item #25701
  • Calcite, ps Shortite, Albite ps Aegirine.
  • 4.4x3.4x2.4 cm
  • Largest Crystal Size: c-9mm, a37mm
  • $55.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • The matrix for this specimen consists of several criss-crossing pseudomorphs of albite after aegirine. On THOSE pseudomorphs are another pseudo that is calcite after shortite. Quite sharp pseudomorphs! Also some calcite, dolomite and analcime crystals scattered around the specimen.
Anatase, ps ilmeniteMont Saint- Hilaire, Pseudomorphs
  • Item #26565
  • Anatase, ps ilmenite
  • 10.0x7.8x8.0 cm
  • Largest Crystal Size: s-17mm, il-3mm, z-2.5mm, py-5mm
  • $75.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • An interesting cluster of various minerals. The most interesting, I think are the anatase pseudomorphs after ilmenite, platy looking aggregates composed of anatase crystals. There are also excellent, sharp dipyramidal zircon crystals, textbook pyritohedral pyrite crystals and loads of white bladed albite crystals all on a matrix of light brown rhombohedral siderite crystals. Not a beautiful piece but interesting!
Siderite, ps Fluorite, Quartz, AlbiteMont Saint- Hilaire, Pseudomorphs
  • Item #27302
  • Siderite, ps Fluorite, Quartz, Albite
  • 3.1x2.8x2.8 cm
  • Largest Crystal Size: 25mm
  • $75.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • This specimen is composed of two pseudomorphs, one larger, one smaller of siderite after fluorite. The pseudos are surprisingly sharp octahedra encrusted with smaller siderite crystals, plus some quartz and albite crystals. Nice example!!