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Sec. III, Ch. 4: The Saffire

Sec. III, Ch. 4: The Saffire Page of 366 Sec. III, Ch. 4: The Saffire Text size:minus plus Restore normal size   Mail page  Print this page
192
The Sapphire.
have as yet yielded only very few stones which are fine enough to be cut for purposes of jewellery, but it is by no means improbable that when a lower depth is reached they may furnish Sapphires of better quality.
In 1896, Mr. W. F. Ferrier, of the Geological Survey of Canada, called attention to the occurrence of Corundum in the township of Carlow, in the northern parts of Hast-ing's County. The mineral had previously been detected, but was generally regarded as apatite or as pyroxene. Subsequent investigation by Mr. Barlow and others proved the existence of a great " Corundum belt," stretching for a length of about 30 miles, with an average width of 2 miles. The Corundum is usually found in crystals and irregular masses, sometimes of large size, embedded in dykes of a felspathic rock, like pegmatite, running through the Laurentian gneiss ; and it has also been discovered in nepheline-syenite, associated with the gneissose series.
Most of the Canadian Corundum is of brownish or greyish colour ; but occasionally it is blue, and in the town­ship of Brudenell it presents varieties of greenish, yellow and even rose-red tints, though the last is extremely rare. The most Sapphire-like varieties hitherto found have been obtained from the township of Methuen, in. Peterborough County.
Some of the Canadian Corundum which I have had cut has yielded small cabochon Sapphires of fair colour.
SAPPHIRE.
Sec. III, Ch. 4: The Saffire Page of 366 Sec. III, Ch. 4: The Saffire
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