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 16% or multiply by 0.84.

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

Siderite/Quartz ps AegerineMont Saint- Hilaire, Pseudomorphs
  • Item #8450
  • Siderite/Quartz ps Aegerine
  • 8.5x7.8x4.5 cm
  • Largest Crystal Size: 76mm
  • $55.00
  • Mont Saint Hilaire

  • Quebec, Canada
  • A couple of deeply striated pseudomorph sections are well embedded in a couple of microcline crystal sections. A very nice synchysite pseudo after remondite at one end. Some relict aegerine in the pseudos. No brookites on this one!
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.
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.
  • $50.00
  • 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!
Analcime ps Cancrinite, MicroclineMont Saint- Hilaire, Pseudomorphs
  • Item #11564
  • Analcime ps Cancrinite, Microcline
  • 4.2x3.9x3.7 cm
  • Largest Crystal Size: 42mm
  • $50.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • An etched prism of analcime after cancrinite that is attached to a microcline crystal section. Sits well for display!
Analcime ps CancriniteMont Saint- Hilaire, Pseudomorphs
  • Item #11569
  • Analcime ps Cancrinite
  • 5.2x3.7x3.2 cm
  • Largest Crystal Size: 52mm
  • $40.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • A sharp prism that is attached to a fragment of microcline. I can't tell you that it is terminated but it does have sharp prism faces! Looks great!
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!