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Another Specimen

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Typical Minerals
QUARTZ - > 20%
Amphibole/Biotite - 10-25%
Detail Description
     In this detail we see a mix of clear, glassy, grayish quartz, white, translucent sodium plagioclase, and amphibole. It is difficult in the picture to separate the quartz from sodium plagioclase, but the quartz mostly fills the tight little spaces among the feldspar and amphibole crystals.
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