Why a miter is hard

A mitered edge is made by cutting two pieces at an angle, usually 45 degrees, so they meet at a corner with no visible end of stone. It is how a thin countertop is made to read as a thick slab, and how a waterfall island turns down to the floor.

The difficulty is that two flat cuts have to meet along their full length, and the veining on the top has to carry over the corner and continue down the side. A tenth of a degree off, or a slab cut from the wrong part of the block, and the edge shows a line or a pattern that does not match.

That is why we use a bridge saw with a mitering head, tape and dry-fit every mitered assembly in the shop, and agree seam position and vein direction on the actual slab before cutting. It is slower. It is also the only honest way to promise the result.