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Granites occur on every continent and have been quarried and used in buildings for millenia, but what are they really?

A video profile of Lew French, an extraordinarily creative stonemason who works on Martha’s Vineyard.
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A video demonstration of splitting stone with wedges and shims by stone tool maker Trow and Holden.
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A video by the National Center for Preservation of Technology and Training (NCPTT) concerning historical dry stone walls in the United States.
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Basic principles of stone masonry that lead to better looking walls, adapted from an article by Bobby Watt.