Record 34/82 Catalog Record Permanent Collection Exhibit Page Home Search Description  Pink granite is the commonest of all intrusive igneous rocks. It has a total silica content greater than 65%, and a minimum quartz content of 20%. Granite is coarse-grained with crystals larger than 5 mm in diameter. It forms at considerable depth in the earth's crust.

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Last modified on: December 16, 2003