Sardonyx
Σαρδώνυξ
Sardonyx (Σαρδώνυξ), a mountain or chain of mountains in Hindostan, noticed by Ptolemy (7.1. § § 20 and 65). It would seem to have been part of the range now known by the name of the Vindhya Mountains. Lassen, in his map, has identified them with the Págapippali Mountains on the right bank of the Narmada (Nerbudda), and Forbiger has supposed them to be the Sátpura Mountains, a continuation of the same chain.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.