+ Are there different qualities in stone?

In the stone industry, natural stone is graded into three different categories Commercial, Standard and Premium. Commercial grade stone is used for exterior cladding and in commercial buildings. Standard grade stone can be found in most shops which can have natural imperfections which make it not an ideal product to work with. At Keystone Granite Inc, we only work with Premium grade stone, a high quality product no matter what your budget.

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