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Minerals Zone > Industrial
Minerals > Slate |
Slate
Slate,
a fine-grained, homogeneous, sedimentary rock being composed of clay
or volcanic ash that has been metamorphosed in layers. It is also made
into roofing slates, called 'roofing shingles' in the US, due to its
two lines of breakability, the cleavage and the grain. This property
of the slate makes it possible to split it into thin sheets. Finer
slates are also used to hone knives. |
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