skos:prefLabel
"porphyry"@en
skos:broader rock (inorganic material)
skos:exactMatch aat:300011232
skos:inScheme <https://data.rkd.nl/thesaurus/scheme/MATERTECHN>
<https://data.rkd.nl/thesaurus/scheme/SUBJECT>
skos:notation "95537"
skos:scopeNote
"A dark purplish-red rock, first quarried in ancient Egypt, containing relatively large crystals in a fine-grained igneous matrix. One of the hardest rocks, it takes a high polish and is valued as a durable sculptor's material and as a decorative architectural material. It is considered the best material for the muller and slab used for grinding artists' colors."@en
prov:generatedAtTime "2023-03-09T12:15:38+00:00"^^xsd:dateTime

Inverse relations

[ .. ] → skos:narrower → porphyry

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