Thread by @ColorsAndStones, COLORS of PORPHYRYRhyolite porphyry = porfido rosso laterizio (Italian name).Guarried at the [...]

Maria Tatiana

ColorsAndStones

COLORS of PORPHYRY
Rhyolite porphyry = porfido rosso laterizio (Italian name).
Guarried at the Wadi Abu Gerida quarry, Eastern Desert, Egypt, first time used during the Roman period.
It's a less commonly used variety of "red" porphyry, has pinkish brown matrix with pink & blue
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Andesite-dacite "imperial porphyry", reddish purple matrix with white & pink.
Ancient names: lapis porphyrites & rubet porphyrites
Italian name: porfido rosso [anticoor Egiziano]
Used minor in Predynastic to Early Dynastic Periods, heavily used since Roman Period.
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Andesite-dacite green porphyry, Porfido Verde Egiziano (It.)
Roman name - lapis hieracitis. Has greenish black matrix with white & pale green.
Used first in Roman period; quarry at Mons Porphyrites, Eastern Desert, Egypt. The best known from the opus sectile decorations, Ravenna.

Dolerite porphyry, greenish black with light gray to greenish gray (1st

). Was used in Late Period’s 30th Dynasty & early Ptolemaic Period; ancient name unknown.

Pictures 2nd & 3rd - two varieties of the andesite-dacite green porphyry (Ravenna

)

Dolerite porphyry, greenish black with light gray to greenish gray (1st ). Was used in Late Period’s 30th Dynasty & early Ptolemaic Period; ancient name unknown. Pictures 2nd & 3rd - two varieties of the andesite-dacite green porphyry (Ravenna )

Two varieties of black andesite porphyry. Incorrect name: breccia, ancient name unknown.
Used from Predynastic to Early Dynastic Periods. As an example two jars from Egypt. I would love to have the one with yellow :-)

The last one, 10th color / variety of porphyry - trachyandesite porphyry, black matrix with pale gray.
Roman name - possibly knekites, Italian name - porfido serpentino nero (do not confuse with serpentinite!).

source: Ornamental Stones, Harrell, James A. https://escholarship.org/uc/item/4xk4h68c#main