David K. Joyce

REDUCED -Grenville Minerals, 40 Percent Off!

Deduct 40% from the listed price and an additional 20% for payment in US$.

All prices in Canadian dollars. For payment in US$, deduct 23% or multiply by 0.77.

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

Gmelinite ps ChabaziteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #4461
  • Gmelinite ps Chabazite
  • 5.3x4.8x3.6 cm
  • Largest Crystal Size: 21mm
  • $25.00
  • Pinnacle Rock, Five Islands
  • Cumberland County, Bay of Fundy
    Nova Scotia, Canada
  • A 21mm well formed gmelinite after/on chabazite crystal is tucked away in this vug. Displays well.
Spinel, CorundumREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #5028
  • Spinel, Corundum
  • 4.1x3.4x2.2 cm
  • Largest Crystal Size: 19mm
  • $30.00
  • Dewitt's Corners

  • Ontario, Canada
  • A composite crystal of black spinel is exposed on a chunk of creamy calcite. You can see that the lower reached of the spinel are coated with or altered to corundum. Characteristic of this Grenville spinel occurrence.
Titanite, FeldsparREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #6386
  • Titanite, Feldspar
  • 5.5x4.6x3.3 cm
  • Largest Crystal Size: 19mm
  • $30.00
  • Miller Property (Lost Mine)
  • Eganville
    Ontario, Canada
  • A well-formed, wedge-shaped, dark brown crystal of titanite on some non-descript brownish feldspar crystals. There ar ealso some smaller titanites on the back of the specimen. Stands up, with support, to make a nice titanite specimen!
CorundumREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #6429
  • Corundum
  • 4.7x3.8x2.5 cm
  • Largest Crystal Size: 19mm
  • $25.00
  • Gutz Farm
  • Combermere
    Ontario, Canada
  • A very thin, slightly tapered, singly terminated corundum crystal in nepheline syenite.
CorundumREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #6436
  • Corundum
  • 4.8x4.0x5.0 cm
  • Largest Crystal Size: 21mm
  • $20.00
  • Gutz Farm
  • Combermere
    Ontario, Canada
  • A couple of crystal sections of sharp, elongate corundum crystals are exposed at the front of this specimen.
TremoliteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #7502
  • Tremolite
  • 4.5x1.2x0.8 cm
  • Largest Crystal Size: as above
  • $35.00
  • Miners Bay

  • Ontario, Canada
  • A slender, lustrous, dark green crystal of actinolite with a nice termination. The crystal seems to be slightly offset which gives it a curved appearance. Nice!
TourmalineREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #9959
  • Tourmaline
  • 6.4x5.8x5.7 cm
  • Largest Crystal Size: 8mm
  • $40.00
  • Tulip Valley

  • Quebec, Canada
  • Lots of brilliantly lustrous, black tourmaline crystals are scattered around amongst light green, rounded pyroxene crystals. Striking, really. Unusual locality.
DraviteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #10601
  • Dravite
  • 3.3x3.2x2.6 cm
  • Largest Crystal Size: 22mm
  • $40.00
  • Tait Farm
  • L'Amable
    Ontario, Canada
  • A cluster of well formed dravite crystals featuring a very nice "crayon" shaped crystal front and centre.