Tag Archives: porphyry

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porphyry
Porphyry is an igneous stone which consists of large grained crystals such as quartz, dispersed in a dense fine grained matrix. It’s a very dense volcanic stone which has a significant amount of colour variation. In stone speak the word “igneous” comes from a Greek word for fire. Deep inside the earth, the temperature is [...]
Written by Jen @ Eco Outdoor. Filed under eco training videos, porphyry, stone quarries. Tagged , . No comments.