David K. Joyce

Grenville Minerals, Various Localities

The Central Metasedimetary Belt of the Grenville Geological Province is famous for large, well formed crystals of apatite, amphiboles, titanite, zircon, etc. I live very close to one of the more productive areas of the Grenville and am happt you present to you these very nice specimens of those sorts of minerals. Here are some:

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.

Pyroxene GroupGrenville Minerals, Various Localities
  • Item #18255
  • Pyroxene Group
  • 4.7x2.0x1.8 cm
  • Largest Crystal Size: 47mm
  • $35.00
  • Trapper's Trail
  • Haliburton Co.
    Ontario, Canada
  • A nice, singly terminated crystal with a small attached crystal on one side. Nice!
RutileGrenville Minerals, Various Localities
  • Item #18883
  • Rutile
  • 12.6x6.0x2.9 cm
  • Largest Crystal Size: 42mm
  • $65.00
  • Templeton township
    Quebec, Canada
  • This is an old classic, Grenville locality with a vague name. Old collections have these "Templeton Township" specimens of rutile in calcite associated with aegirine crystals. Long, somewhat curved, elongated crystals/ Excellent!
Spessartine, MuscoviteGrenville Minerals, Various Localities
  • Item #12138
  • Spessartine, Muscovite
  • 5.2x3.0x0.3 cm
  • Largest Crystal Size: s-4.5mm
  • $35.00
  • Villeneuve Mine
  • 31-I Villeneuve Township, Papineau Co.
    Quebec, Canada
  • Interesting specimen showing a spessartine crystal, flattened in and between sheets of biotite.
Spessartine, MuscoviteGrenville Minerals, Various Localities
  • Item #12144
  • Spessartine, Muscovite
  • 8.3x5.1x0.3 cm
  • Largest Crystal Size: s-5mm
  • $75.00
  • Villeneuve Mine
  • 31-I Villeneuve Township, Papineau Co.
    Quebec, Canada
  • Four, sharp, flattened crystals of gemmy red spessartine are embedded in this "book" of mica. If you hold it to the light, you can see that the garnets go right through the mica(Of course you can see them on the other side too!). An attractive, interesting specimen from this large pegmatite deposit.
Spessartine, MuscoviteGrenville Minerals, Various Localities
  • Item #12147
  • Spessartine, Muscovite
  • 11.5x8.2x0.2 cm
  • Largest Crystal Size: 5mm
  • $60.00
  • Villeneuve Mine
  • 31-I Villeneuve Township, Papineau Co.
    Ontario, Canada
  • A single ruby-red spessartine crystal is embedded in this muscovite crystal. The spessartine crystal can be seen on both sides of the mica. Very good specimen from this large pegmatite deposit.
Uvite ps SerendibiteGrenville Minerals, Various Localities
  • Item #14084
  • Uvite ps Serendibite
  • 5.8x4.2x2.3 cm
  • Largest Crystal Size: 18mm
  • $85.00
  • Portage du Fort
  • Pontiac County
    Quebec, Canada
  • There are two uvite pseudomorphs after serendibite at the top of this specimen. Both of them have natural fractures through them that have been partially filled with diopside, phlogopite and a brownish, prismatic mineral that resembles a tourmaline group mineral. Interesting piece!
TremoliteGrenville Minerals, Various Localities
  • Item #18188
  • Tremolite
  • 4.1x4.3x1.9 cm
  • Largest Crystal Size: n/a
  • $40.00
  • Miner's Bay

  • Ontario, Canada
  • A very sharp, dark green, excellent prism of tremolite with poor terminations.
Calcite, MarcasiteGrenville Minerals, Various Localities
  • Item #17706
  • Calcite, Marcasite
  • 6.0x4.0x3.3 cm
  • Largest Crystal Size: as above
  • $60.00
  • Canada Talc Mine, Dolomite Pit
  • Madoc
    Ontario, Canada
  • A rather large (for the locality), twinned calcite crystal with no matrix. The crystals is lustrous, shows the rhombohedron form, predominately and has tiny specks of marcasite crystals just under the surface of the crystal. Some bruising on the sides. Displays very well.
DiopsideGrenville Minerals, Various Localities
  • Item #15503
  • Diopside
  • 5.8x5.5x2.4 cm
  • Largest Crystal Size: 27mm
  • $40.00
  • Dog Lake
  • nr. Battersea
    Ontario, Canada
  • Several, sharp diopside crystals are perfectly exposed on this calcite matrix. The crystals are all sharp but to some extent hoppered. They are a light green colour with a thin talc alteration veneer. Nice specimen!
PyroxeneGrenville Minerals, Various Localities
  • Item #15655
  • Pyroxene
  • 6.7x3.6x2.9 cm
  • Largest Crystal Size: as above.
  • $45.00
  • Lot 13, Rang 15, Canton de Hull
  • Gatineau
    Quebec, Canada
  • A very light coloured, well formed pyroxene group crystal. The crystal is square in cross section with beveled sides and a very good termination. An old classic.
Amphibole GroupGrenville Minerals, Various Localities
  • Item #18193
  • Amphibole Group
  • 5.3x3.3x2.2 cm
  • Largest Crystal Size: 27mm
  • $40.00
  • Trapper's Trail
  • Haliburton
    Ontario, Canada
  • A couple of very sharp amphibole crystals propped up by a pyroxene crystal fragment. Very nice!
FluororichteriteGrenville Minerals, Various Localities
  • Item #19725
  • Fluororichterite
  • 9.5x5.3x3.6 cm
  • Largest Crystal Size: 79mm
  • $45.00
  • George Earle Farm
  • Wilberforce
    Ontario, Canada
  • A nice, black, prismatic, crystal of this unusual amphibole group mineral. It is doubly terminated but the terminations are sort of multiple. Sits naturally like in the picture. With a stand would look great vertically, as well. Nice specimen!
Microcline, AegirineGrenville Minerals, Various Localities
  • Item #21216
  • Microcline, Aegirine
  • 5.5x4.0x2.7 cm
  • Largest Crystal Size: ae-5.1, m-4.2
  • $55.00
  • Girardville

  • Quebec, Canada
  • A very sharp, well terminated microcline crystal with some dark-green, aegirine prism sections attached. Sits perfectly!
Aegirine, MicroclineGrenville Minerals, Various Localities
  • Item #21218
  • Aegirine, Microcline
  • 9.8x4.0x2.2 cm
  • Largest Crystal Size: 73mm
  • $65.00
  • Girardville

  • Quebec, Canada
  • This specimen is primarily a cluster of dark green aegirine crystal sections with a microcline crystal section attached. Good looking interesting specimen of this pyroxene mineral.
Orthoclase, ps. ScapoliteGrenville Minerals, Various Localities
  • Item #22118
  • Orthoclase, ps. Scapolite
  • 7.1x7.7x6.4 cm
  • Largest Crystal Size: 38mm
  • $65.00
  • Griffith

  • Ontario, Canada
  • A cluster of very scapolite-looking crystals that are actually orthoclase pseudomorphs after scapolite. Even the stria are faithfully preserved. Displays very well!
FluorapatiteGrenville Minerals, Various Localities
  • Item #22277
  • Fluorapatite
  • 8.7x6.0x6.4 cm
  • Largest Crystal Size: as above
  • $75.00
  • Fortin & Gravelle Mine
  • Gatineau Park
    Quebec, Canada
  • A very large, well-formed termination of fluorapatite from this unusual location. Shows well!
MeioniteGrenville Minerals, Various Localities
  • Item #22461
  • Meionite
  • 3.8x2.5x1.8 cm
  • Largest Crystal Size: 35mm
  • $40.00
  • Bear Lake
  • Pontiac County
    Quebec, Canada
  • A nice couple of meionite crystals in parallel growth. The crystals are creamy white with small alteration patches of a mica or allanite.
MagnetiteGrenville Minerals, Various Localities
  • Item #22463
  • Magnetite
  • 3.5x3.5x2.9 cm
  • Largest Crystal Size: as above
  • $35.00
  • Gatineau Park

  • Quebec, Canada
  • A fairly sharp but rough-hewn octahedron of magnetite from this unusual location. Gatineau Park is all of the locality information that I have.
DiopsideGrenville Minerals, Various Localities
  • Item #22713
  • Diopside
  • 5.4x4.0x2.5 cm
  • Largest Crystal Size: 25mm
  • $35.00
  • Dog Lake
  • Frontenac Co.
    Ontario, Canada
  • Very nice diopside crystal well exposed, naturally, in white calcite.
DiopsideGrenville Minerals, Various Localities
  • Item #22714
  • Diopside
  • 11.4x6.0x3.4 cm
  • Largest Crystal Size: 26mm
  • $40.00
  • Dog Lake
  • Frontenac Co.
    Ontario, Canada
  • A sharp crystal of light green diopside sits at one end of a piece of naturally weathered calcite. That is, the diopside was exposed by solution of the calcite by natural weak acids in the soil. Great looking piece!
TremoliteGrenville Minerals, Various Localities
  • Item #24218
  • Tremolite
  • 5.3x4.2x3.7 cm
  • Largest Crystal Size: 16mm
  • $45.00
  • Norland

  • Ontario, Canada
  • Here is a vug of gemmy, dark green tremolite crystals on a matrix of interlocking tremolite crystals. The crystals are well terminated, somke fairly gemmy striated prisms. Right in the middle is a gemmy, emerald-like smaller, doubly-terminated crystal. Beautiful! s
TitaniteGrenville Minerals, Various Localities
  • Item #24226
  • Titanite
  • 5.9x4.7x4.9 cm
  • Largest Crystal Size: 36mm
  • $65.00
  • Highland Grove

  • Canada
  • A well formed crystal of titanite protrudes out of a matrix of interlocking amphibole and titanite crystals with a little calcite between crystals. Good looking specimen! s
Fluorapatite, FluoriteGrenville Minerals, Various Localities
  • Item #24227
  • Fluorapatite, Fluorite
  • 8.3x7.5x4.8 cm
  • Largest Crystal Size: f-35mm
  • $40.00
  • Yates Mine
  • Otter Lake
    Quebec, Canada
  • A couple of parallel growth fluorapatite crystals are deeply embedded in dark purple fluorite on calcite vein-dyke matrix. Interesting association! s
FluorapatiteGrenville Minerals, Various Localities
  • Item #24320
  • Fluorapatite
  • 7.2x5.1x3.5 cm
  • Largest Crystal Size: 54mm
  • $55.00
  • Keuhl Lake
  • Brudenell Township
    Ontario, Canada
  • Two reddish, doubly terminated, fluorapatite crystals embedded and well exposed in very coarsely crystallized calcite cleavages. Usually apatite crystals from this famous zircon locality are smaller. Shows well too! s
MagnetiteGrenville Minerals, Various Localities
  • Item #24323
  • Magnetite
  • 9.1x7.8x4.3 cm
  • Largest Crystal Size: 52mm
  • $85.00
  • Bentley Lake Occurance
  • Bancroft
    Ontario, Canada
  • A cluster of several clunky, yet fairly sharp octahedral crystals of magnetite in an impressive cluster, very typical of this locality. No other minerals present other than some phlogopite flakes on the magnetite crystals here and there. Displays very well. s
Titanite, MagnetiteGrenville Minerals, Various Localities
  • Item #24343
  • Titanite, Magnetite
  • 9.6x5.5x5.3 cm
  • Largest Crystal Size: m-47mm, t-8mm
  • $85.00
  • New York Mine
  • Haliburton
    Ontario, Canada
  • Here is an interesting paragenesis! These rough but well shaped octahedra of magnetite are totally covered with much smaller, brown, titanite crystals the magnetite crystals. The titanite crystals appear to be oriented on the magnetite crystals. Different and interesting! s