David K. Joyce

Grenville, Craigmont Corundum Mine, Renfrew County, Ontario

The Craigmont Mine (originally the Craig Mine) was once a relatively large mine in the world of industrial minerals. It There was a large mill building on site and corundum ore was extracted from several pits. The operations of the Craigmont Mine were all within the first 20 years of the 20th century. It has not operated since. It is still possible to find well formed corundum crystals here and there around the old mine site. Here are some examples.

All prices in Canadian dollars. For payment in US$, deduct 24% or multiply by 0.76.

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

CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26768
  • Corundum
  • 11.5x5.5x6.0 cm
  • Largest Crystal Size: 35mm
  • $75.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A thick, tapered, brown corundum crystal is exposed in the front of a fine grained, feldspar matrix. The feldspar is spiked with many small crystals and fragments of corundum thoughout. The main crystal is horizontally striated with good luster. The termination is not complete but, still the specimen shows well.
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26769
  • Corundum
  • 7.1x3.0x2.8 cm
  • Largest Crystal Size: 35mm
  • $45.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A sharp, brown corundum crystal is embedded and partially intergrown with orange feldspar.
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26770
  • Corundum
  • 6.9x3.5x3.8 cm
  • Largest Crystal Size: 25mm
  • $35.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A tapered corundum crystal section is exposed in feldspar-corundum matrix. Corundum; the hardest mineral after diamond on the Moh's scale!
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26771
  • Corundum
  • 4.3x3.0x2.5 cm
  • Largest Crystal Size: 26mm
  • $45.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A squat, doubly terminated corundum crystal is well exposed in feldspar, magnetite, pyrite and phlogopite matrix. Not as dark brown as usual but more of a brownish green. Nice!
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26772
  • Corundum
  • 11.5x6.7x4.7 cm
  • Largest Crystal Size: 37mm
  • $85.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A well formed, hexagonal, brown crystal of corundum is well exposed at the top of this feldspar-corundum matrix. The crystal has very good shape and luster. Stands perfectly for display!
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26773
  • Corundum
  • 6.5x7.4x4.3 cm
  • Largest Crystal Size: 36mm
  • $65.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A very sharp, singly terminated corundum crystal is perfectly exposed at the front of this feldspar matrix. Displays perfectly!
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26774
  • Corundum
  • 5.2x5.3x3.1 cm
  • Largest Crystal Size: 52mm
  • $40.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A short, sort of tabular corundum crystal that has terminations embedded in feldspar. Nice example.
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26775
  • Corundum
  • 4.1x2.4x2.3 cm
  • Largest Crystal Size: as above
  • $40.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A well formed, singly-terminated brown, tapering, corundum crystal with a little feldspar attached to one face. Nice!
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26776
  • Corundum
  • 4.5x4.3x3.7 cm
  • Largest Crystal Size: 35mm
  • $35.00
  • Craigmont Mine
  • Renfrew County
    Canada
  • A well formed brown corundum crystal section is nicely exposed at the front and top of a feldspar and corundum matrix.
CorundumGrenville, Craigmont Corundum Mine, Renfrew County, Ontario
  • Item #26780
  • Corundum
  • 3.6x3.4x2.6 cm
  • Largest Crystal Size: 27mm
  • $35.00
  • Craigmont Mine
  • Renfrew County
    Ontario, Canada
  • A sharp, doubly terminated corundum crystal is embedded in the top of this feldspar and corundum matrix. The terminations are largely intergrown with feldspar but are there! Nice example!