While Boyce’s crystal may be the largest single crystal of copper sulfate, students at the Kurfrüst-Ruprecht-Gymnasium in Germany hold the record for overall size. Their polymorphic crystal reached a ...
The rolling hills of Calaveras County have produced some of the purist, largest quartz crystals in the world. It was 1897 when Calaveras County joined the ranks of Japan, Brazil, Switzerland and ...
Islands on MSN
Arkansas' 'quartz crystal capital of the world' offers breathtaking mountain views, trails, and mines
Arkansas was once one of the country's largest quartz producers. Remnants of that legacy can be found in the hills of the ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results