Bidspirit auction | An Islamic Deep Blue Intaglio

An Islamic Deep Blue Intaglio Gemstone with Calligraphic Inscription, Possibly Sapphire. An oval-shaped intaglio gemstone of deep blue hue, featuring finely engraved calligraphic inscriptions around the edges. Approximately 2.5 x 1.7cm Provenance: Part of a private collection based in W London.