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07-12-2008, 10:37 AM
Thread: Purple Slurry = Blue Belgian ???
by Howard- Replies
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Slate makes a dark gray slurry and the blue makes...
Slate makes a dark gray slurry and the blue makes a purple slurry. That property is called "streak" to geologists and is one of the field tests used to identify stones. They rub the stone against a...
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