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Updated: May 29, 2025
Among these he found rich specimens of iron and copper ores, slabs of the rare and exquisitely beautiful Labradorite, with its sheen of peacock-blue, and even bits of gold-bearing quartz. For a long time he examined and tested these; then, with a sigh of content, he laid them aside and went to bed.
These feldsparites sometimes form mountain masses almost without any admixture of other minerals; but at other times they include augite, which passes into hypersthene. They are often granitoid in structure. One of the varieties is the same as the apolescent labradorite rock of Labrador.
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