Concept information
Preferred term
Porphyry
Definition
- A dark purplish-red rock, first quarried in ancient Egypt, containing relatively large crystals in a fine-grained igneous matrix; takes a hard polish and is valued as a durable sculptor's material and as a decorative architectural material; considered the best material for the muller and slab used for grinding artists' colors [AAT, alt.]
Broader concept
Notation
- 119276
In other languages
-
French
URI
http://data.loterre.fr/ark:/67375/JLC-HX10PQXZ-M
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