This guide is intended to show some of the much-prized rocks and
minerals of the northwest. Some are valued for their beauty when
cut and polished. Others are prized for the economic value of the
metals they contain, such as copper in chalcopyrite, or of some
physical property of the mineral itself, such as the fibrous nature
of asbestos. Still other minerals are valued for their crystal
form, or, simply as examples of the great diversity in the mineral
kingdom.
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