Porphyry

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Porphyry may refer to:Porphyry (geology), an igneous rock with large crystals in a fine-grained matrix and important Roman building material Porphyritic, the general igneous texture of a rock with two distinct crystal (phenocryst) sizes Porphyry copper deposit, a primary ore deposit of copper, consisting of porphyry rocks Tyrian purple or Porphyra, a purple-red natural dye "Porphyria's Lover", originally published as "Porphyria", a poem by Robert Browning Porphyrian tree, classic device for illustrating hierarchy and ontology Porphyria, a disease Porphyrins, a group of organic compounds