tephrias
Could not find tephrian in Logeion dictionaries.
tephrian Noun: masculine accusative singular of tephrias
tephrĭas, ae, m., = τεφρίας,
- a kind of ash-colored stone, Plin. 36, 7, 11, § 56.
tephriās, ae, Akk. ān, m. (τεφρίας sc. λίθος) der aschfarbige Marmor, Plin. 36, 56.
tĕphrĭās, æ, m. (τεφρίας), marbre de couleur cendrée : Plin. 36, 56.
tĕphrĭas, m.: tefria (marmo color cenere) Plin
♢ acc. -an.