por·phy·ry /ˈpɔrf(ə)ri/
斑岩
Por·phy·ry n.; pl. Porphyries Geol. A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles.
Porphyry shell Zool., a handsome marine gastropod shell (Oliva porphyria), having a dark red or brown polished surface, marked with light spots, like porphyry.
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porphyry
n : any igneous rock with crystals embedded in a finer
groundmass of minerals [syn: porphyritic rock]