| SlateSlatestone is a very fine grained metamorphic rock derived from the sedimentary rock `shale`. Slate is composed mostly of mica, chlorite and quartz. Shale is subject to heat and pressure and the fine particles are `melted` together to form slate.
Slate is characterized by a sub parallel orientation which imparts a strong parallel cleavage to the rock which allows the slate rock to be split into thin but tough sheets of slate. Slate has a fine to medium grained surface texture and has an excellent shining property. |
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