Howlite is a borate mineral that is commonly found in sedimentary rock formations. One distinctive feature of Howlite is its ability to take on the appearance of other minerals through a process known ...
Turquoise - the blue and green gemstone - is often seen as emblematic of the West. A couple of listeners have asked about turquoise mines in Colorado. KRCC’s Shanna Lewis spoke with Clint Cross of ...
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