All that glitters ... might be rock. Collector Marc Weill (center), with adviser Dennis Tanjeloff (left) and partner Daniel Trinchillo, the "Indiana Jones" of the operation. Together, they've amassed ...
Southern Arizona has numerous sites known for their pyroxene minerals, from Twin Buttes south of Tucson, to Ajo, to the Chiricahua, Santa Rita and Patagonia mountain ranges. Pyroxenes are classified ...
Minerals like topaz, calcite and quartz are attracting collectors looking for a more affordable and less saturated market. By Shivani Vora Jewelry and art have long captivated both collectors and the ...
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