. The Canadian journal of industry, science and art. . MINERALS AND GEOLOGY OF CANADA. 527 masses) = 124!°30' in hornblende, and 87°5' in augife; but some of the liglitcoJoured {diopside) crystals belong- ing to the latter, occur in flat rhombic prisms like fig. 40 above, and give an angle of 141°21'*. Structure, lamellar or fibrous. ;0-6'0; sp. gr. 3'2-3-5. Fu- sible, the dark varieties yielding magnetic globules. Composition, as in Hornblende: see above. The dark- green, black, and brown varieties commonly bear the augite (proper) or pyroxene; the clear green varieties, that of sahli
. The Canadian journal of industry, science and art. . MINERALS AND GEOLOGY OF CANADA. 527 masses) = 124!°30' in hornblende, and 87°5' in augife; but some of the liglitcoJoured {diopside) crystals belong- ing to the latter, occur in flat rhombic prisms like fig. 40 above, and give an angle of 141°21'*. Structure, lamellar or fibrous. ;0-6'0; sp. gr. 3'2-3-5. Fu- sible, the dark varieties yielding magnetic globules. Composition, as in Hornblende: see above. The dark- green, black, and brown varieties commonly bear the augite (proper) or pyroxene; the clear green varieties, that of sahlite; and the white, greyish, or pale-green varieties, that of diopside—but many additional names have been bestowed on this mineral, in relation to, locality, structure and other conditions. Both hornblende and augite, it should be remarked, offer a transition to serpentine i one stage in this transition producing the peculiar varieties, ashestus and amianthus. These are chiefly of a light-green or white colour, fibrous, silky, and flexible—often to such an extent as to admit, of being woven into cloth. Biallage, described below appears to be a transitional form of this kind. Augite occurs in the bands of crystalline limestone—and in some places as a rock component, forming, in admixture with Wollastonite, distinct beds— interstratified with the gneissoid rocks of the Laurentian Series, as in the counties of Argenteuil, Terrebonne, &c. In Argenteail county, a green, granular variety {Coccolite) is also found. This mineral occurs likewise in the raetaniurphic schists of the eastern townships, and in crystals and gratmlar masses in the eruptive rocks of Montarville, Kougemont, &c., belonging to that section of the Province. Hypersthene. Bronzite. Biallage.—These are generally regarded as varieties of Augite. They occur in cleavabie masses of a pinch- beck-brown, green or greenish-grey colour, usually with a pseudo- metallic lustre. Sp. gr. 3-2-3*5. Fusible mor
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