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 18% or multiply by 0.82.

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.
Ferri-FluorokatophoriteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #17851
  • Ferri-Fluorokatophorite
  • 5.0x3.5x3.5 cm
  • Largest Crystal Size: 25mm
  • $40.00
  • Bear Lake Diggings
  • nr. Gooderham
    Ontario, Canada
  • A nice cluster of sharp, lustrous, pitch-black crystals of this unusual amphibole mineral, associated with a rounded crystal of fluorapatite. Sits well for display.
Titanite, OrthoclaseREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14437
  • Titanite, Orthoclase
  • 6.2x5.2x5.5 cm
  • Largest Crystal Size: t-22mm, o-50mm
  • $45.00
  • Miller Property
  • Eganville
    Ontario, Canada
  • An interesting one! A razor-sharp, partially corroded titanite crystal sits atop a smaller orthoclase which in turn sits atop a larger, equant orthoclase.
Fluoborite, NorbergiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14557
  • Fluoborite, Norbergite
  • 4.6x3.7x3.5 cm
  • Largest Crystal Size: 1mm
  • $40.00
  • Crystal Lake
  • Galway Township, Peterborough County
    Ontario, Canada
  • This specimen holds a group of fluoborite crystals, slightly divergent, well exposed.
Ferri-FluorokatophoriteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #19053
  • Ferri-Fluorokatophorite
  • 5.7x5.9x6.0 cm
  • Largest Crystal Size: 42mm
  • $45.00
  • Bear Lake Diggings
  • Haliburton Co.
    Ontario, Canada
  • A cluster of several FFK crystals with a little orthoclase associated. Shows well.
Ferri-FluorokatophoriteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #19057
  • Ferri-Fluorokatophorite
  • 5.5x3.7x3.0 cm
  • Largest Crystal Size: 40mm
  • $45.00
  • Bear Lake Diggings
  • Haliburton Co.
    Ontario, Canada
  • Sweet! A doubly-terminated, sharp crystal of FFK! It is very sharp and was attached to the vein-dyke wall on the back.
Ferri-FluorokatophoriteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #19036
  • Ferri-Fluorokatophorite
  • 4.9x4.6x4.1 cm
  • Largest Crystal Size: 27mm
  • $50.00
  • Bear Lake Diggings
  • Haliburton
    Ontario, Canada
  • A really nice cluster of FFK crystals with a couple of small, rounded orthoclase crystals.
Titanite, OrthoclaseREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #11202
  • Titanite, Orthoclase
  • 3.3x2.5x2.5 cm
  • Largest Crystal Size: 12mm
  • $30.00
  • Miller Property (Lost Mine)
  • Eganville
    Ontario, Canada
  • A sharp, dark brown titanite sits of some rough orthoclase crystals along with a few smaller titanites.
Titanite, OrthoclaseREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #11220
  • Titanite, Orthoclase
  • 2.8x2.7x2.5 cm
  • Largest Crystal Size: 28mm
  • $30.00
  • Bear Lake Diggings
  • nr. Gooderham, Haliburton Co.
    Ontario, Canada
  • A very nice, well formed. slightly altered titanite crystal, attached to a similar sized orthoclase crystal. Thumbnail-sized! Looks good from both sides.
Fluoborite, NorbergiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14558
  • Fluoborite, Norbergite
  • 4.1x3.3x2.7 cm
  • Largest Crystal Size: 1mm
  • $40.00
  • Crystal Lake
  • Galway Township, Peterborough County
    Ontario, Canada
  • This specimen has two areas of dluoborite. One is a single crystal embedded in the calcite while the other is an intergrowth of clear fluoborite crystals with norbergite.
Fluoborite, NorbergiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14554
  • Fluoborite, Norbergite
  • 3.1x3.0x1.8 cm
  • Largest Crystal Size: 1mm
  • $35.00
  • Crystal Lake
  • Galway Township, Peterborough County
    Ontario, Canada
  • A blocky, singly terminated crystals is embedded in the white calcite at the end of this specimen.
Fluoborite, NorbergiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14549
  • Fluoborite, Norbergite
  • 4.0x4.4x2.8 cm
  • Largest Crystal Size: 1mm
  • $40.00
  • Crystal Lake
  • Galway Township, Peterborough County
    Ontario, Canada
  • A fairly sharp, distorted fluoborite crystal is embedded in calcite on this piece.
Fluoborite, NorbergiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14551
  • Fluoborite, Norbergite
  • 3.4x2.6x2.0 cm
  • Largest Crystal Size: 1mm
  • $45.00
  • Crystal Lake
  • Galway Township, Peterborough County
    Ontario, Canada
  • Some very nice, creamy-white fluoborite crystals on this specimen!
Fluoborite, NorbergiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14553
  • Fluoborite, Norbergite
  • 6.0x4.5x3.0 cm
  • Largest Crystal Size: 1mm
  • $45.00
  • Crystal Lake
  • Galway Township, Peterborough County
    Ontario, Canada
  • An excellent, gemmy fluoborite crystal on this specimen, along with other crystal and aggregates of crystals plus orange norbergite.
Pyroxene GroupREDUCED -Grenville Minerals, 40 Percent Off!
  • 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.
Orthoclase, FluorapatiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #18208
  • Orthoclase, Fluorapatite
  • 12.3x11.0x4,5 cm
  • Largest Crystal Size: Or 48mm, Ap 38mm
  • $70.00
  • Miller Property
  • Eganville
    Ontario, Canada
  • A large cluster of orthoclase crystals with a few prisms of fluorapatite crystals present. Good locality piece!
Fluoborite, NorbergiteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14559
  • Fluoborite, Norbergite
  • 5.0x3.8x2.4 cm
  • Largest Crystal Size: 1mm
  • $60.00
  • Crystal Lake
  • Galway Township, Peterborough County
    Ontario, Canada
  • A fairly sharp fluoborite crystal perfectly exposed from the calcite. Excellent!
Orthoclase, TitaniteREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #18216
  • Orthoclase, Titanite
  • 9.1x8.8x6.0 cm
  • Largest Crystal Size: Or 40mm, Ti 14mm
  • $65.00
  • Miller Property
  • Eganville
    Ontario, Canada
  • Medium to well formed crystals of orthoclase are stacked on this wall rock with a single, sharp crystal of titanite on top!
Monazite-(Ce), AnataseREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #14668
  • Monazite-(Ce), Anatase
  • 4.0x1.6x2.6 cm
  • Largest Crystal Size: micro
  • $35.00
  • Mont Saint-Hilaire

  • Quebec, Canada
  • Clusters and individuals of gemmy, yellow monazite, associated with sharp anatase crystals on carbonate crystals.
PyroxeneREDUCED -Grenville Minerals, 40 Percent Off!
  • 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.
Titanite, PyroxeneREDUCED -Grenville Minerals, 40 Percent Off!
  • Item #18227
  • Titanite, Pyroxene
  • 7.6x5.2x3.7 cm
  • Largest Crystal Size: t-12mm
  • $35.00
  • Miller Property
  • Eganville
    Ontario, Canada
  • A stack of partially altered pyroxene crystals with a lustrous, sharp titanite crystal on top. Nice association piece.