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Lartos was an ancient village on the southeast coast of Rhodes. There is a major marble formation nearby, lithos lartios, a gray-blue stone distinctive of the island, quarried in antiquity largely for local use.
References
Craik, Elizabeth (1980). The Dorian Aegean. New York: Routledge & Kegan Paul Ltd. p. 19.
For the term lithos lartios, Inscriptiones Graecae vol. XII, 1, no. 677; Sylloge Inscriptionum Graecarum, 3rd ed, no. 338, lines 7-8; no. 725, lines 11-12. For the geology of Lartian stone see G. P. Marinos, ed., Annales geologiques des pays helleniques, ser. 1, vol. 22 (1970) pp. 110-112.