Arkansas black quartz cluster in glass ball
PUMI2347
The Ouachita Mountains in Montgomery County, Arkansas, provided sharp arrowheads to the Indians 400 years ago. But it was during the Second World War that mines developed a lot, with the need for a quartz oscillator in telecommunications: a pure crystal oscillated at a stable frequency when it was electrically stimulated! And when man was able to manufacture synthetic quartz from the 50s and 60s, wholesalers in Hot Springs turned to tourists who visited the area. These crystals were formed in cracks that appeared at the end of the mountain formation, 280 to 245 million years ago. This completely natural crystal owes its hue to a natural irradiation... Indeed, when the aluminum impurities contained in a quartz, is found near radioactive minerals such as uranium or thorium contained in granite, a change of colori will gradually take place. Obviously, the longer the radiation exposure time, the darker the crystal will be, like this one! But don’t worry, this sublime mineral is not radioactive, even if you open its globe.
