| 300-9iddbcftrs ((ELBAITE in MUSCOVITE on QUARTZ)), $75 MINIMUM BID, Ingersoll Mine, Pennington County, South Dakota, 8 x 7.5 x 3 cm, Cabinet | |
 | bluish green Tourmaline in Muscovite. More Tourmaline can be seen within the layers of Muscovite. Quartz on the one side solidly holds the Muscovite sheets together. |
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