The photos below presently don't have links --but they are at sufficiently high resolutions for power point.
 Quartz in geode. |
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 Biotite (left) and muscovite (right). |
 Zoning in plagioclase. |
 Table salt (cubic cleavage) |
 Halite crystals |
 Differently colored calcite crystals. |
 Rhombic cleavage in calcite. |
 Streak (in chalcopyrite). |
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