As rock and gem lovers gather in Denver, mineral broker tells his tales

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(Photo: Jeff Scovil, courtesy Collector's Edge Minerals)
<p> Three Topaz crystals from the Tarryall Mountains in Colo. The largest one weighs 8.5 ounces.</p>

(Photo: prospector)This weekend, rock collectors, mineral prospectors and fossil experts from all over the country are at Denver's Mineral and Gem Show.

Graham Sutton, a mineral broker, has wild tales of prospecting in rare corners of the globe and many discoveries to his credit, including an ancient petrified tree in China. That tree took an epic journey across the world and is now on display at the Denver Museum of Nature and Science.

Ryan Warner interviews Graham Sutton for "Colorado Matters."