Both in ancient and modern times the Om symbol has been captured by artist around the world..  Here are just a few images of such wondrous finds on stone.

Mohenjo-daro Seal Om on the Saddle

Om At Palatki Ruins Sedona,AZ - USA

Montezuma Castle Arizona-petroglyph

With Ancient Om upper right

Ancient Om's on stone

Cretan Seal With OM.

Ancient Monpa Mani Stone Arunachal India

Mohenjo-daro Seal Om Saddle

Om Synbol At India Dormida

Ancient art on stone - Om symbol in center

Om Mani Padme Hum Rock - Tibetan Script

Ancient stone writings with OM

Modern writings with OM

Ladakh India Buddhist Prayer Petroglyph

Stones create OM symbol at

Omkara Mandhata

Om Mani Peme Hung Lhagang

Om Shanti Mandiram