archaicwonder:Roman Obsidian Intaglio Ringstone, 1st-2nd Century ADThe square-shaped intaglio engrav
archaicwonder:Roman Obsidian Intaglio Ringstone, 1st-2nd Century ADThe square-shaped intaglio engraved with the profile head of a bearded warrior wearing a high-crested helmet, re-set in a modern metal ring -- source link