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: 1/2 x 3/8 x 3/16 in. (1.2 x 1 x 0.5 cm)
Classification: Gems
Credit line: Gift of John Taylor Johnston, 1881
Accession year: 1881