David K. Joyce

Grenville Minerals, Various Localities, Page Two

Here are some more unusual specimens from the Grenville Geological Province.

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.

CorundumGrenville Minerals, Various Localities, Page Two
  • Item #17629
  • Corundum
  • 15.0x11.3x5.7 cm
  • Largest Crystal Size: 45mm
  • $75.00
  • Gutz Farm
  • Rosenthal
    Ontario, Canada
  • A fairly sharp, hexagonal, slightly tapered corundum crystal protrudes out of nepheline syenite along with a number of corundum crystal fragments. Excellent geological and mineralogical sample!
RutileGrenville Minerals, Various Localities, Page Two
  • Item #18884
  • Rutile
  • 7.1x4.8x3.2 cm
  • Largest Crystal Size: 29mm
  • $75.00
  • Templeton Township
    Quebec, Canada
  • A specimen of rutile in calcite from this classic old Grenville locality. This place is famous for very elongated rutile crystals in calcite!
TremoliteGrenville Minerals, Various Localities, Page Two
  • Item #18240
  • Tremolite
  • 11.2x6.3x5.2 cm
  • Largest Crystal Size: 83mm
  • $75.00
  • Dancey Property
  • Haliburton Co.
    Ontario, Canada
  • A cluster of interlocking tremolite crystals from small acicular to large prismatic.
TremoliteGrenville Minerals, Various Localities, Page Two
  • Item #18250
  • Tremolite
  • 5.8x3.9x1.8 cm
  • Largest Crystal Size: 32mm
  • $50.00
  • Dancey Property
  • Haliburton Co.
    Ontario, Canada
  • A cluster of just barely green, end-member tremolite. Very nice!
TremoliteGrenville Minerals, Various Localities, Page Two
  • Item #18244
  • Tremolite
  • 4.3x1.4x1.1 cm
  • Largest Crystal Size: as above
  • $45.00
  • Dancey Property
  • Haliburton Co.
    Ontario, Canada
  • A highly lustrous, colourless, striated prismatic crystal with a poor termination. (they all have poor terminations from here) End member tremolite, for sure!
Pyroxene GroupGrenville Minerals, Various Localities, Page Two
  • Item #18207
  • Pyroxene Group
  • 5.5x4.8x3.5 cm
  • Largest Crystal Size: 20mm
  • $35.00
  • Miller Property
  • Eganville
    Ontario, Canada
  • Nice specimen of pyroxene from this modern classic locality.
Pyroxene GroupGrenville Minerals, Various Localities, Page Two
  • Item #18194
  • Pyroxene Group
  • 4.2x2.8x2.2 cm
  • Largest Crystal Size: 39mm
  • $35.00
  • Trapper's Trail
  • Haliburton
    Ontario, Canada
  • A sharp, well terminated pyroxene crystal with a fragment of the original calcite attached to the termination. The crystal has a crack down the middle but seems well held together.
TremoliteGrenville Minerals, Various Localities, Page Two
  • Item #18239
  • Tremolite
  • 8.7x6.2x4.8 cm
  • Largest Crystal Size: 15mm
  • $65.00
  • Dancey Property
  • Haliburton Co.
    Ontario, Canada
  • A plate of striated, not well terminated end-member tremolite crystals with very good prism faces.
FluororichteriteGrenville Minerals, Various Localities, Page Two
  • Item #19143
  • Fluororichterite
  • 10.8x9.5x7.6 cm
  • Largest Crystal Size: 84mm
  • $150.00
  • Earl Farm
  • Wilberforce
    Ontario, Canada
  • A classic Grenvillian specimen showing sharp fluoro-richterite crystals, a rare qamphibole mineral, embedded in white calcite. Sits perfectly for display.
Calcite, PyriteGrenville Minerals, Various Localities, Page Two
  • Item #20155
  • Calcite, Pyrite
  • 4.7x3.6x3.4 cm
  • Largest Crystal Size: 30mm
  • $120.00
  • Lyndhurst
  • Leeds Township
    Ontario, Canada
  • Wow! THIS is a nice calcite specimen! The nice forms, hematite zoning, pyrite sprinkles and historic, classic location make it extra special. This location was mined for electronic-grade quartz crystals during the second world war and they also came across these excellent calcite clusters, as well. Looks fantastic!
Fluoro-richteriteGrenville Minerals, Various Localities, Page Two
  • Item #21770
  • Fluoro-richterite
  • 9.3x8.1x4.7 cm
  • Largest Crystal Size: 80mm
  • $85.00
  • Wilberforce
    Ontario, Canada
  • A really nice, showy specimen of fluororichterite showing a really nice, twinned crystal embedded in white calcite, with a couple of other crystal fragments. These specimens come from two locations in the Wilberforce area. One is a road-cut and one is the George Earle farm property. This is an old timer from the Court Saunders collection and his label accompanies it. Grenville classic!
SchorlGrenville Minerals, Various Localities, Page Two
  • Item #21772
  • Schorl
  • 5.9x4.0x3.7 cm
  • Largest Crystal Size: 22mm
  • $35.00
  • Hybla Road
    Ontario, Canada
  • An interesting locality piece from a Roadcut on the Hybla Road near Bancroft. Pitch-black schorl crystal sections in glassy quartz with a little orangey feldspar.
MarialiteGrenville Minerals, Various Localities, Page Two
  • Item #21782
  • Marialite
  • 6.0x3.4x3.9 cm
  • Largest Crystal Size: 34mm
  • $55.00
  • Clarke Road Cut
  • Highland Grove
    Ontario, Canada
  • Nice cluster of white scapolite crystals, in particular, end member marialite from an unusual locality. Fluoresces deep red. Sits perfectly!
Stilbite, Heulandite, PyroxeneGrenville Minerals, Various Localities, Page Two
  • Item #21891
  • Stilbite, Heulandite, Pyroxene
  • 7.0x3.4x2.4 cm
  • Largest Crystal Size: s-15mm, h-3mm
  • $45.00
  • Maniwaki

  • Quebec, Canada
  • Interestingly, very well formed zeolites are sometimes found in very old Grenville openings that have been subjected to low temperature hydrothermal alteration. Here is a good example. The poor pyroxene crystals that form the matrix for very well formed stilbite and heulandite cryustals. The stilbite crystals are present as classic, divergent clusters with an orange-brown colouration. The heulandites are present as well formed crystals with pearly luster on the pinacoids so typical of heulandite. Very nice example!
DraviteGrenville Minerals, Various Localities, Page Two
  • Item #22020
  • Dravite
  • 5.9x4.2x3.4 cm
  • Largest Crystal Size: 20mm
  • $35.00
  • Canada Talc Mine
  • Madoc
    Ontario, Canada
  • Dark-brown, glassy, hexagonal dravite crystals are embedded in this lighter-brown mica schist matrix. The dravite crystals are sharp and one is curved and distorted in an interesting way. Classic Madoc!
NephelineGrenville Minerals, Various Localities, Page Two
  • Item #22105
  • Nepheline
  • 13.5x10.0x7.3 cm
  • Largest Crystal Size: 45mm
  • $120.00
  • Davis Hill
  • Bancroft
    Ontario, Canada
  • This fragment of massive nepheline syenite has one side covered with crystals of nepheline. The crystals are hexagonal prisms with pinacoidal terminations. This is the classic nepheline occurrence in the Grenville Geological Province.
CyrtoliteGrenville Minerals, Various Localities, Page Two
  • Item #22275
  • Cyrtolite
  • 10.0x7.0x6.7 cm
  • Largest Crystal Size: 50mm
  • $70.00
  • McDonald Mine
  • Hybla
    Ontario, Canada
  • This is one ugly specimen! but it IS interesting! It consists ofa main portion of dark, smokey quartz which has crystals of a number of minerals attached to it but most interestingly, zircon, variety cyrtolite. There are quite a few well formed, tetragonal zircon crystals scattered about. This old mine has now been "reclaimed" and collecting opportunities there will be minimal in future. TS
Dravite, TremoliteGrenville Minerals, Various Localities, Page Two
  • Item #22281
  • Dravite, Tremolite
  • 5.5x5.5x2.4 cm
  • Largest Crystal Size: Dr 40mm, Tr 8mm
  • $65.00
  • Bancroft
    Ontario, Canada
  • I obtained this specimen years ago from an old collection. It shows a large crystal of tremolite associated with pitch-black crystals of dravite. It is not from Tait Farm but one of the smaller, obscure locations just south of Bancroft. Old label accompanies it.