Lake Superior Agate
Agate is a micro crystalline variety of silica, chiefly chalcedony, characterized by its fineness of grain and brightness of color. This particular agate came from the shores of Lake Superior in Michigan. Specimen Dimension: approximately 4 cm.
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agate gem gemstone cut gemstone polished gemstone micro-crystalline silica chalcedony rock mineral mineralogy geology mineral sample banded banding silica silicaceous mineral silicon compound silicon dioxide semiprecious stone semi-precious gem great lakes lake superior superior agate lake superior agate Michigan
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