For thousands and thousands of years, it's been a trade that has stood the test of time.
From the Great Pyramids to the Taj Mahal, craftsmen have used this simple material to erect some of the greatest buildings and monuments in history.
Stone is prized for both its sturdiness and beauty.
Karl Marcus is a stonemason.
NBC Montana went with Karl to a riverbed near Virginia City, where he collects river rock from Alder Gulch dredge tailings.
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