David K. Joyce

Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario

The Gole Quarry is a pegmatite that was originally operated for feldspar for the ceramics industry. Later, it was used as a source of aggregate and then decorative stone. It is a very coarse pegmatite with huge crystals of mica and feldspar with a quartz core. From a mineralogical standpoint, it is famous for excellent fergusonite-(Y) crystals that are embedded in the feldspar and quartz. Here are some very food examples of this relatively rare, Yttrium-rich mineral! Very radioactive.

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.

Fergusonite-(Y)Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26934
  • Fergusonite-(Y)
  • 4.6x4.6x3.6 cm
  • Largest Crystal Size: 31mm
  • $95.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • Here is a good one. This specimen shows a sharp, well terminated fergusonite crystal embedded in radiation fractured feldspar and quartz, along wit ha couple of other incomplete fergusonite crystals. The termination of the fergusonite exhibits that unusual, very steep pyramidal face that we see on fergusonite crystals. Very good!
Fergusonite-(Y), BiotiteGrenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26935
  • Fergusonite-(Y), Biotite
  • 6.1x4.1x3.5 cm
  • Largest Crystal Size: 28mm
  • $75.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • This specimen shows a larger fergusonite crystap poking out from the quartz, beside a biotite crystal fragment. The crystal is very well shaped on this side while more complex but complet on the back. As well there is another sharp, smaller crystal on the back-side. Very good!
Fergusonite-(Y), BiotiteGrenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26936
  • Fergusonite-(Y), Biotite
  • 2.7x2.1x1.3 cm
  • Largest Crystal Size: 20mm
  • $40.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • The top and bottom of this specimen are both bounded by biotite crystals. On the left, a larger fergusonite crystal butts against both biotite crystals. the smaller crystal in the middle is terminated. Nice example!
Fergusonite-(Y)Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26937
  • Fergusonite-(Y)
  • 3.8x4.4x3.2 cm
  • Largest Crystal Size: 10mm
  • $65.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • A very sharp, well terminated, tapering crystal of fergusonite is embedded in smoky quartz in this specimen. Well exposed!
Fergusonite-(Y)Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26938
  • Fergusonite-(Y)
  • 2.7x2.4x0.8 cm
  • Largest Crystal Size: 22mm
  • $65.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • A fairly well formed fergusonite crystal is attached to quartz matrix. A little of the termination of the fergusonite crystal is chipped off. The fergusonite crystal formed against biotite and the back of the crystal is covered with part of the biotite crystal.
Fergusonite-(Y), BiotiteGrenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26939
  • Fergusonite-(Y), Biotite
  • 5.0x3.3x2.3 cm
  • Largest Crystal Size: 26mm
  • $45.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • A composit fergusonite crystal that has multiple terminations is partly exposed in matrix and the back of the matrix is one black biotite crystal section. To the left of the featured fergusonite is a section of a much larger fergusonite crystal. Interesting one!
Fergusonite-(Y)Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26940
  • Fergusonite-(Y)
  • 3.3x2.7x1.7 cm
  • Largest Crystal Size: 17mm
  • $40.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • This specimen shows two offshoot crystals attached to a larger crystal section of fergusonite. A little bruising to the crystals. They are metamict and very fragile! Nice example!
Fergusonite-(Y)Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26941
  • Fergusonite-(Y)
  • 4.0x3.1x2.1 cm
  • Largest Crystal Size: 44mm
  • $85.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • A large fergusonite crystal attached to quartz-feldspar-mica matrix. The crystal is well terminated from the front but, in fact, part of the termination is missing on the back. Excellent example, anyway!
Fergusonite-(Y), BiotiteGrenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26942
  • Fergusonite-(Y), Biotite
  • 5.2x5.0x3.4 cm
  • Largest Crystal Size: 7mm
  • $40.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • A single, well formed 7mm, crystal of fergusonite is well exposed on the top of this quartz and biotite matrix. Radioactive. Looks good!
Fergusonite-(Y)Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26943
  • Fergusonite-(Y)
  • 2.3x1.3x1.3 cm
  • Largest Crystal Size: 15mm
  • $45.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • Two parallel terminations of fergusonite-(Y) are attached to quartz matrix. Nice terminations!
Fergusonite-(Y)Grenville, Fergusonite-(Y), J.G. Gole Quarry, Madawaska, Ontario
  • Item #26944
  • Fergusonite-(Y)
  • 4.7x4.4x1.9 cm
  • Largest Crystal Size: 10mm
  • $45.00
  • J. G. Gole Quarry
  • Madawaska
    Ontario, Canada
  • Two well, formed, tapered crystals of fergusonite are exposed at the top of this rusty, smoky-quartz matrix. Nice crystals of this relatively rare radioactive mineral!