David K. Joyce

Grenville Minerals, Various Localities, Page Two

Here are some more unusual specimens from the Grenville Geological Province.

All prices in Canadian dollars. For payment in US$, deduct 20% or multiply by 0.8.

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

Item #17629 Corundum 15.0x11.3x5.7 cm Largest Crystal Size: 45mm $75.00 Gutz Farm Rosenthal Ontario, Canada A fairly sharp, hexagonal, slightly tapered corundum crystal protrudes out of nepheline syenite along with a number of corundum crystal fragments. Excellent geological and mineralogical sample!	Item #18884 Rutile 7.1x4.8x3.2 cm Largest Crystal Size: 29mm $75.00 Templeton Township Quebec, Canada A specimen of rutile in calcite from this classic old Grenville locality. This place is famous for very elongated rutile crystals in calcite!	Item #18240 Tremolite 11.2x6.3x5.2 cm Largest Crystal Size: 83mm $75.00 Dancey Property Haliburton Co. Ontario, Canada A cluster of interlocking tremolite crystals from small acicular to large prismatic.	Item #18250 Tremolite 5.8x3.9x1.8 cm Largest Crystal Size: 32mm $50.00 Dancey Property Haliburton Co. Ontario, Canada A cluster of just barely green, end-member tremolite. Very nice!
Item #18244 Tremolite 4.3x1.4x1.1 cm Largest Crystal Size: as above $45.00 Dancey Property Haliburton Co. Ontario, Canada A highly lustrous, colourless, striated prismatic crystal with a poor termination. (they all have poor terminations from here) End member tremolite, for sure!	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.	Item #18194 Pyroxene Group 4.2x2.8x2.2 cm Largest Crystal Size: 39mm $35.00 Trapper's Trail Haliburton Ontario, Canada A sharp, well terminated pyroxene crystal with a fragment of the original calcite attached to the termination. The crystal has a crack down the middle but seems well held together.	Item #18239 Tremolite 8.7x6.2x4.8 cm Largest Crystal Size: 15mm $65.00 Dancey Property Haliburton Co. Ontario, Canada A plate of striated, not well terminated end-member tremolite crystals with very good prism faces.
Item #19143 Fluororichterite 10.8x9.5x7.6 cm Largest Crystal Size: 84mm $150.00 Earl Farm Wilberforce Ontario, Canada A classic Grenvillian specimen showing sharp fluoro-richterite crystals, a rare qamphibole mineral, embedded in white calcite. Sits perfectly for display.	Item #20155 Calcite, Pyrite 4.7x3.6x3.4 cm Largest Crystal Size: 30mm $120.00 Lyndhurst Leeds Township Ontario, Canada Wow! THIS is a nice calcite specimen! The nice forms, hematite zoning, pyrite sprinkles and historic, classic location make it extra special. This location was mined for electronic-grade quartz crystals during the second world war and they also came across these excellent calcite clusters, as well. Looks fantastic!	Item #20157 Titanite, Magnetite 7.8x9.5x7.5 cm Largest Crystal Size: t-10mm $120.00 New York Mine Glamorgan Township Ontario, Canada This is an interesting piece! Sharp, lustrous titanite crystals almost totally cover magnetite crystals and, I expect, were derived from the magnetite which presumably titaniferous! A little bit of a magnetite crystal is exposed on one side. Lots of elongated fluorapatite crystal sections are embedded in the titanite and magnetite. Fine looking specimen of an unusual association.	Item #21770 Fluoro-richterite 9.3x8.1x4.7 cm Largest Crystal Size: 80mm $85.00 Wilberforce Ontario, Canada A really nice, showy specimen of fluororichterite showing a really nice, twinned crystal embedded in white calcite, with a couple of other crystal fragments. These specimens come from two locations in the Wilberforce area. One is a road-cut and one is the George Earle farm property. This is an old timer from the Court Saunders collection and his label accompanies it. Grenville classic!
Item #21591 Tremolite 3.5x2.2x1.7 cm Largest Crystal Size: as above $65.00 Miners Bay Ontario, Canada A very lustrous, dark green tremolite crystal from this well known, Ontario locality. Excellent termination!	Item #21771 Titanite 7.0x5.6x4.7 cm Largest Crystal Size: 35mm $150.00 Gooderham Ontario, Canada Four very nice, dark-chocolate brown titanite crystals intertwined with a bunch of amphibole crystals, the largest quite well formed and complete. Actually, the specimen may be shown a couple of different ways equally well. Only a couple of very small nicks. Classic Grenville association!	Item #21772 Schorl 5.9x4.0x3.7 cm Largest Crystal Size: 22mm $35.00 Hybla Road Ontario, Canada An interesting locality piece from a Roadcut on the Hybla Road near Bancroft. Pitch-black schorl crystal sections in glassy quartz with a little orangey feldspar.	Item #21773 Ferrocolumbite 7.4x3.9x1.8 cm Largest Crystal Size: 30mm $35.00 Aquarose Quarry Quadeville Ontario, Canada A couple of crystal sections of this black pegmatite mineral. This pegmatite was once explored as a potential source of columbite-tantalite.
Item #21776 Xenotime-(Y) 5.5X4.3X0.5 cm Largest Crystal Size: 4mm $65.00 Gunter Quarry Sabine TWP Ontario, Canada A sharp, half, wedge-shaped crystal of this unusual, rare Y phosphate from a classic locality. The crystal is embedded in feldspar, the commercial product of the mine back in 1934-37.	Item #21782 Marialite 6.0x3.4x3.9 cm Largest Crystal Size: 34mm $55.00 Clarke Road Cut Highland Grove Ontario, Canada Nice cluster of white scapolite crystals, in particular, end member marialite from an unusual locality. Fluoresces deep red. Sits perfectly!	Item #21787 Fluorapatite 7.7x7.5x3.7 cm Largest Crystal Size: 34mm $35.00 Wilson's Corners Quebec, Canada A simple, complete, doubly terminated, light blue-ish crystal of fluorapatite is embedded but exposed nicely in the top of this pinkish calcite matrix. There is an incomplete crystal in front of it. Nice!	Item #21891 Stilbite, Heulandite, Pyroxene 7.0x3.4x2.4 cm Largest Crystal Size: s-15mm, h-3mm $45.00 Maniwaki Quebec, Canada Interestingly, very well formed zeolites are sometimes found in very old Grenville openings that have been subjected to low temperature hydrothermal alteration. Here is a good example. The poor pyroxene crystals that form the matrix for very well formed stilbite and heulandite cryustals. The stilbite crystals are present as classic, divergent clusters with an orange-brown colouration. The heulandites are present as well formed crystals with pearly luster on the pinacoids so typical of heulandite. Very nice example!
Item #22020 Dravite 5.9x4.2x3.4 cm Largest Crystal Size: 20mm $35.00 Canada Talc Mine Madoc Ontario, Canada Dark-brown, glassy, hexagonal dravite crystals are embedded in this lighter-brown mica schist matrix. The dravite crystals are sharp and one is curved and distorted in an interesting way. Classic Madoc!	Item #22105 Nepheline 13.5x10.0x7.3 cm Largest Crystal Size: 45mm $120.00 Davis Hill Bancroft Ontario, Canada This fragment of massive nepheline syenite has one side covered with crystals of nepheline. The crystals are hexagonal prisms with pinacoidal terminations. This is the classic nepheline occurrence in the Grenville Geological Province.	Item #22275 Cyrtolite 10.0x7.0x6.7 cm Largest Crystal Size: 50mm $70.00 McDonald Mine Hybla Ontario, Canada This is one ugly specimen! but it IS interesting! It consists ofa main portion of dark, smokey quartz which has crystals of a number of minerals attached to it but most interestingly, zircon, variety cyrtolite. There are quite a few well formed, tetragonal zircon crystals scattered about. This old mine has now been "reclaimed" and collecting opportunities there will be minimal in future. TS	Item #22276 Seybold Mine 5.6x5.3x2.8 cm Largest Crystal Size: 37mm $35.00 Cantley Outaouais Quebec, Canada A well formed crystal of fluorapatite with a peculiar greenish colouration embedded in pinkish calcite. The crystals from this area of the Grenville are often seen with this colour. Unusual!
Item #22281 Dravite, Tremolite 5.5x5.5x2.4 cm Largest Crystal Size: Dr 40mm, Tr 8mm $65.00 Bancroft Ontario, Canada I obtained this specimen years ago from an old collection. It shows a large crystal of tremolite associated with pitch-black crystals of dravite. It is not from Tait Farm but one of the smaller, obscure locations just south of Bancroft. Old label accompanies it.