Spinel, Forsterite, Mica

Parker Mine, Notre Dame Du Laus, Quebec
Canada
Dimensions: 6.3x6.8x3.4 cm
Largest crystal size: 20mm mm
Price: CA

$75.00

A single, 15mm, sharp and well formed black octahedral spinel sits on a matrix of, mostly, forsterite. There's a second bigger spinel on the specimen as well, partially exposed in the forsterite matrix at 20mm. The faces have successive, stacked layers of parallel crystal growth. The specimen is riddled with smaller spinel crystals, as well as numerous bits of mica on the surface of one side. The crystals are a very good size for the locality.

From the well-known, now closed to collecting, locality known as the Parker Mine. The Parker Mine was originally opened to mine Mica in the early 1900s. This area is noted for the abundance of exceptionally large, well-formed crystals of various rock-forming minerals commonly found in the carbonate vein-dyke systems. The Parker mine has yielded large, euhedral crystals of altered forsterite up to 30 cm in size, and fine ferroan spinel crystals up to 6 cm. The area is one of regionally metamorphosed Precambrian sediments. The principal mineral occurrence lies within a green rock complex (metagabbro, calc-silicate, amphibole rock types) which may have formed as a result of igneous activity. A nice specimen!

Note: All prices are in Canadian dollars (CAD). International customers are charged in CAD, exchange rate is calculated automatically by your bank/paypal upon checkout.

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D Joyce Minerals
Rare Canadian & Global
Minerals, since 1983

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