Plasma ring stone
Object type: Intaglio
Department: Greek and Roman Art
Culture: Roman
Period: Late Republican or Imperial
Date: 1st century BCE–3rd century CE
Medium: Plasma
Dimensions: Other: 1/4 x 5/16 x 1/16 in. (0.6 x 0.8 x 0.2 cm)
Classification: Gems
Credit line: Gift of John Taylor Johnston, 1881
Accession year: 1881