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Post by coloradojeff on Mar 20, 2011 13:55:57 GMT -5
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Post by auplater on Mar 20, 2011 18:07:48 GMT -5
Looks like skeletal quartz and chalcedony. Calcite is much softer... can you scratch them with a knife? If not, they're probably quartz also. Soak them in dilute bleach and then super iron out after rinsing to clean them up.
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