Whether you call them minerals or crystals, the Hudson Valley has a solid clutch of establishments that sell these beautiful stones. We drove many, many miles to find the best to produce a (semi-) ...
Por: Denis Fougerouse, investigador de la Facultad de Ciencias de la Tierra y Planetarias, Curtin University. El mineral pirita fue históricamente apodado ‘el oro de los tontos’ debido a su engañoso ...
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