Porphyry, an igneous granite that forms when magma is exposed to air through fissures in the Earth's crust, is the latest darling of landscape designers. Essentially a fast-cooled magma, porphyry is ...
In 1992, Renzo Stenico and his son Fulvio located a porphyry quarry in the unlikely village of San Juan de los Rangeles, in central Mexico. It was no accident. More than two decades earlier, the elder ...
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