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 20% or multiply by 0.8.

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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!	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!	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!	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.
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!	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!	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!	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!
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!