Exports of commodity group "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. The share of commodity group in total exports from Canada decreased by 0 p. Exports of commodity group amounted to 0. The share of exports of commodity group in sales of commodity group from Canada increased by 0. Top export destinations of "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement.
The value of imports of commodity group "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement.
Sales of commodity group to Canada went up by 8. Imports of commodity group "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. The share of commodity group in total imports to Canada decreased by 0 p. Imports of commodity group reached 1. The share of purchases of commodity group in total imports of commodity group to Canada increased by 0. Top trading partners import of "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement.
Source: UN Comtrade. Download chart. Export destinations of Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement.
This area has become urbanized, with industrial and residential development closing in on the old dumps. Dolime Quarry, Guelph: This quarry has only become popular in recent years and has become a source for nice sphalerite crystals.
I, personally, have not collected at this quarry but have seen some excellent specimens with large, complex sphalerite crystals to 50mm across, associated with small calcite crystals. The crystals are usually a dark brown to bright orange to dark-brown with good lustre. Some sphalerite is gemmy and has been facetted. Douglas Point : When the nuclear power station was built at Douglas Point, rock was excavated for some of the facilities. The excavation of the spillway for water from the plant revealed cavities of well-formed, gray celestine crystals to 50mm or so.
This was a one-time occurrence and the time to collect was short so only a relatively few specimens were recovered. They are only a few hundred metres apart and are working in exactly the same strata - Silurian dolostones of the Guelph and Lockport formations. However, there are subtle differences between the two quarries.
In general, the sphalerite at Flamboro seems more lustrous and gemmy than the sphalerite at Lafarge. As well, the fluorite crystals at Flamboro can be a bit more brownish, sometimes with an outer phase of light lavender fluorite while this is less common at Lafarge.
At the time of writing, the quarry is closed on weekends and, thus, no collectors are allowed to collect. This has effectively shut down organized collecting at the Flamboro quarry.
The fluorite crystals from this quarry can be superb. They are simple cubes to 30mm, clear to colourless but usually tinted brownish, possibly due to inclusions of hydrocarbons.
The crystals can be found as single crystals on matrix, scattered crystals and clusters on matrix and as tightly packed crystals lining vugs. Fluorite at Flamboro quarry is often associated with orangey-brown sphalerite crystals.
As at Lafarge quarry, the fluorite is usually in large boulders of very hard rock and recovery can be difficult. The sphalerite at this quarry can be fabulous. It is commonly found as smaller, mm crystals but can also be found in gemmy, complex, twinned aggregates to mm in size.
Colour ranges from pitch black to a gorgeous burnt-orange colour. Recently, very nice galena crystals have been found at Flamboro with well-formed crystals up to 25mm or so. Crystals usually show the cube as the predominate form but some are modified by octahedral and dodecahedral faces.
Modest specimens of calcite to 60mm , gypsum in complex crystals to mm, marcasite to 15mm and other minor minerals have also been found at the Flamboro Quarry. Despite its proximity to the Lafarge quarry, celestine crystals, to my knowledge have not been recovered there. Why is it orange? Maggie Wilson pointed me to the American Mineralogist, Volume V64, p, which explains that the orange colour in celestine is caused by the presence of copper Wilson, M Single crystals are rare and vug fillings tend to be semi-radiating, closely compacted aggregates up to mm or so.
Some small marcasite and calcite crystals are sometimes associated with the orange celestine. At some locations, particularly the Deforest Quarry, the presence of significant copper has resulted in malachite being formed, sometimes in micro-crystals Wilson M. These nodules are sometimes hollow and are lined with crystals of calcite, dolomite, celestine and chalcopyrite.
Apparently, there is an overhang of rock at the site, which can be very dangerous. I am told that the locality was exhausted many years ago and is currently off-limits to collecting on private land Benoit G. Inverhuron: Very well formed crystals of calcite occur in cavities in limestone on the shore of Lake Huron, just north of the town of Inverhuron, Ontario The strata with the calcite crystals is at lake level or below high water level most years.
When the water level in Lake Huron is low, the strata with the crystals is at or just above the water level and then it is fairly easy to access them. The calcite is unique and shows twinning on plus interesting hoppered faces.
The best crystals occur in clay filled openings and they are gemmy and clear. Crystals that occur in openings not filled with clay tend to be slightly frosted. As well, balls of radiating white strontianite crystals to one centimetre occur with the calcite in some areas. There are a couple of zones where 10mm or so sharp, icy-blue celestine crystals can be found. Unfortunately, the occurrences are now within the boundaries of an Ontario Provincial Park Inverhuron and collecting is probably not allowed.
It is huge in size and is really composed of three large excavations, two of which are finished. The quarry started out on the south side of Highway 5 but a new quarry was started on the north side of the road and connected by a tunnel blasted beneath the road.
Rock is now blasted and crushed in the third quarry and transported south to the distant processing and shipping plant by overland conveyor. People, beginners and seasoned collectors, have been visiting this quarry to collect fine mineral specimens for many decades. There are various types of open spaces where well-formed crystals occur. These openings are the favourite place to find excellent celestine, fluorite, sphalerite and calcite. There are many veins of calcite up to dozens of metres long that cut through the limestone, many of which are large and contain abundant openings of calcite.
There are also veins of sulphides marcasite, galena and sphalerite that are fairly massive, in a couple of places in the quarry.
The Lafarge quarry is probably most famous for the celestine crystals that occur in the lower layers of rock at the quarry. Quarrying is not always done in the lower layers strata and so celestine is not always available. Long stretches have gone by with no celestine being found. The celestine crystals are found in many habits including large simple prisms to mm, large prisms with multiple terminations, small, milky, doubly-terminated prisms, scattered on matrix and smaller gemmy doubly-terminated crystals.
Colour ranges from colourless to milky white to sky blue and crystals can be highly lustrous or dull-opaque. The larger crystals are almost always loose in the pockets having been jarred from the vug walls by blast vibrations. The larger crystals almost always have micro marcasite crystals included in them and, on occasion have calcite or galena crystal on their surfaces.
Celestine sometimes occurs with gypsum. The fluorite at this location tends to be amber to colourless, simple cubic crystals up to mm on-edge but normally more like mm or smaller in size.
Lustre is usually excellent. The crystals are, however, often in tight vugs in the hardest rock in the quarry and so can be very difficult to extract intact. Fluorite is often found in the long rows of armour stone that is set aside for use in breakwaters or other barriers.
Fluorite occurs, most commonly with sphalerite, marcasite and calcite. Interesting specimens have been recovered showing fluorite crystals embedded in hard, black hydrocarbon. Sphalerite is usually red-brown to brown to black and almost always in complexly twinned crystals to 35mm or aggregates up to mm or so across. It occurs with fluorite, calcite and marcasite crystals.
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