red antique porphyry

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  13. red antique porphyry
Scope note
A rock, similar to diorite, composed of a compact felsitic base in which hornblende or feldspar is porphyritically developed. The celebrated red Egyptian porphyry or 'Rosso Antico' is a red antique porphyry.
red antique porphyry
Accepted term: 30-Sep-2024