Discover slate: a widely spread rock with a very ancient history. Find out its characteristics, color and uses.
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30+ Stone Bathtubs That Will Rock Your Bathroom (Images)
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Slate: characteristics, types, colors and uses - Dedalo Stone
Slate - Wikipedia
Slate: characteristics, types, colors and uses - Dedalo Stone
Natural Slate,Quartzite Series - RefineStone Industrial Co.,LIMITED
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Slate Colors National Slate Association