Did cutters ever pre carve stones and carve desired cut layout lines prior to cutting said stone cutting? I have a stone in an oval cab shape. The carved lines on the bottom look like if you were to follow them it would end up with a step cut. On the top side a very light carving of a rectangle on the top of the oval and lines through to the edges of the stone past the rectangle...it would be an easy cut to make just eyeballing it. Has anyone ever heard of such a technique from the past?
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