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 $65.00 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 #29942 Uraninite, Titanite 3.6x3.0x2.8 cm Largest Crystal Size: 5mm $65.00 Cardiff Uranium Mine Wilberforce Ontario, Canada There is a sharp cube of uraninite on the top of this matrix of fluorite, pyroxene and white calcite. The uraninite crystal is attached to a poorly formed, wedge-shaped titanite crystal. Interesting calcite vein-dyke specimen1	Item #29941 Uraninite 3.8x2.7x2.5 cm Largest Crystal Size: 7mm $75.00 Cardiff Uranium Mine Wilberforce Ontario, Canada A fairly well formed 7mm cube of uraninite sits atop this vein-dyke matrix of fluorite, pyroxene, mica and white calcite.	Item #28672 Titanite, Microcline 5.2x2.1x2.4 cm Largest Crystal Size: 14mm $40.00 Titanite Hill Tory Hill Canada A sharp, dark-brown, wedge-shaped titanite crystal is perfectly situated on an elongated microcline crystal.
Item #29945 Uraninite 1.0cm cm Largest Crystal Size: 10mm $75.00 Cardiff Uranium Mine Wilberforce Ontario, Canada A simple, pretty-well complete, simple cube of uraninite from this famous place!	Item #29263 Zircon 9.0x6.0x5.2 cm Largest Crystal Size: 6mm $45.00 Keuhl Lake Brudenell Township Ontario, Canada A 6mm, sharp zircon crystal is well exposed in this cavity in feldspar. Keuhl Lake is one of the more famous localities for zircon crystals, in the world.	Item #22105 Nepheline 13.5x10.0x7.3 cm Largest Crystal Size: 45mm $80.00 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 #22281 Dravite, Tremolite 5.5x5.5x2.4 cm Largest Crystal Size: Dr 40mm, Tr 8mm $45.00 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.
Item #24539 Dravite 6.4x3.6x3.2 cm Largest Crystal Size: 13mm $55.00 Goshen Ontario, Canada A number of dark-brown dravite crystals are exposed in pure-white calcite cleavages on a phlogopite mica matrix. Nice specimen from an unusual Grenville location! s	Item #24669 Andradite, Grossular 13.0x5.9x5.5 cm Largest Crystal Size: 9mm $45.00 Marmoraton Mine Marmora Ontario, Canada Nice example of the garnets from the gigantic skarn zone that is/was the Marmoraton Iron Mine. The mine was a very large open pit that has now been closed for decades. Some feldspar crystals associated. Nice! s	Item #24735 Muscovite, Tremolite 6.9x3.8x4.7 cm Largest Crystal Size: 36mm $40.00 Calumet Island Pontiac County Quebec, Canada Interesting, twinned muscovite crystals nicely exposed in white marble matrix. The crystals resemble a Mercedes-Benz symbol. Unusual crystallization.	Item #24739 Muscovite, Tremolite 14.1x6.5x5.1 cm Largest Crystal Size: Mu 40mm $65.00 Calumet Island Pontiac County Quebec, Canada This specimen shows a number of "hockey stick"-like twinned crystals of muscovite embedded in but nicely exposed in/on white calcite-tremolite marble. twinning like this is not often seen in muscovite.
Item #24741 Schorl 11.1x5.2x5.5 cm Largest Crystal Size: 30mm $65.00 Calumet Island Pontiac County Ontario, Canada Terminated crystals of schorl are nicely exposed on white marble in this specimen. One particular crystal is dominant. Interesting piece from an unusual locality!	Item #24747 Stilbite 6.9x 5.2x3.8 cm Largest Crystal Size: 2mm $55.00 Strain Lake, HWY 41, nr. Khartoum, Griffith TWP. Renfrew County Ontario, Canada A vug of stilbite crystals from the Grenville! These crystals were precipitated from low temperature hydrothermal solutions that broke down older silicates in the surrounding rocks. Unusual!	Item #24786 Tremolite 8.8x5.9x4.0 cm Largest Crystal Size: n/a $40.00 H&H Quarry, Haley Sta., Ross TWP Renfrew County Ontario, Canada Very colourless, tightly packed tremolite crystals. Tremolite usually has a green tint due to iron content. If iron content is high enough, the tremolite transitions to the actiolite end of the tremolite-actinolite series. This is pure end-member tremolite!	Item #24897 Rutile 3.5x2.4x1.7 cm Largest Crystal Size: 18mm $45.00 MacGregor Lake Templeton Township Quebec, Canada This is the premier rutile locality in the Grenville and has produced many striated, twinned and untwinned rutile crystals. Here is a nice example!
Item #24915 Dravite 5.1x4.4x3.5 cm Largest Crystal Size: 16mm $40.00 West Pierrepont St. Lawrence Co. New York, USA A couple of black dravite crystals are partially embedded in a matrix of light-coloured tremolite crystals. The dravite crystals have the crayon-shape termination and good lustre. Unusual specimen from the American side of the Grenville Geological province. s	Item #26302 Pyroxene, etc. 6.8x4.4x3.7 cm Largest Crystal Size: 10mm $35.00 Yates Mine Otter Lake Quebec, Canada A plate of lustrous, very dark green pyroxene crystals, associated with pinkish, rounded microcline crystals and dark purple fluorite around some of the crystals.	Item #26313 Rutile, Aegirine 5.7x3.0x2.5 cm Largest Crystal Size: 16mm $45.00 Little Dam Lake Wakefield Quebec, Canada This isuch an interesting locality for rutile! You can see the rutile in the calcite matrix as very elongated, almost ropy crystals, that curve and snake between the green, aegirine crystals. Very cool!	Item #26314 Tremolite 6.7x6.8x6.2 cm Largest Crystal Size: 17mm $55.00 Minden Ontario, Canada The display front of this specimen shows nicely exposed equant crystals of very light-green tremolite crystals, naturally etched from calcite matrix. Most of the crystals are doubly terminated with nice terminations.
Item #26419 Fluorite 5.5x3.5x3.9 cm Largest Crystal Size: as above $55.00 Rogers Mine Madoc Ontario, Canada A very gemmy, light green, cube of fluorite with octahedral modifications. Old timer!	Item #26478 Diopside, Calcite 7.8x6.5x6.5 cm Largest Crystal Size: 54mm $75.00 Dog Lake Battersea Ontario, Canada A rather large, for the locality, diopside crystal is nicely exposed in creamy-white calcite, along with some much smaller crystals. The diopside crystals are a very pale greenish colour and associated with a few phlogopite crystals. Displays well.	Item #26581 Tremolite 2.8x2.7x2.6 cm Largest Crystal Size: as above $45.00 Norland Ontario, Canada A doubly terminated dark green, short prismatic tremolite crystal from Norland. Usually, crystals from this location are smaller! Nice one1	Item #26595 Dravite, Quartz 10.3x5.0x5.3 cm Largest Crystal Size: 33mm $140.00 Powers Farm Pierrepont New York, USA A cluster of black, lustrous, equant dravite crystals, associated with rough quartz crystals. The cluster shows three main dravite crystals and some smaller ones. Displays nicely too! A Very nice specimen from the American side of the Grenville Geological Province.
Item #29528 Tremolite 14.0x2.9x2.5 cm Largest Crystal Size: As above $45.00 Bristol (Hilton Mine) Bristol twp. Pontiac Co. Quebec, Canada A long fragment of tightly packed tremolite crystals, with a curious curvature to it. Very light coloured so I assume it is close to end-member tremolite. From an unusual locality, as well!	Item #27973 Magnetite 7.8x7.0x3.7 cm Largest Crystal Size: 20mm $45.00 Bentley Lake Occurence Bancroft, Hastings County Ontario, Canada A couple of fairly well formed, simple octahedra of magnetite are nicely exposed in the middle of this calcite vein-dyke matrix. Shows well.	Item #29674 Grossular, Diopside, Calcite 6.4x3.3x3.5 cm Largest Crystal Size: 6mm $45.00 York River Skarn Zone Bancroft, Hastings County Ontario, Canada The York River area has been off limits for many years now, since the installation of a conservation area. This specimen was collected decades ago and sports a very well formed grossular crystal. Could be etched to reveal more grossulars and diopside crystals...or not. :)	Item #29491 Diopside 2.0x1.2x0.9 cm Largest Crystal Size: As above $35.00 Ch. Principal road cut N. of Laurel Quebec, Canada A well-formed, partially gemmy, singly terminated crystal of diopside from this Grenville occurrence.