A carnelian intaglio

A gold ring set with a carnelian intaglio of a Fortuna.
Roman, 1st-2nd century AD. 
⁡
The intaglio measure 1.2×1cm
Ring size UK L-M, US 6 1/2
18ct gold with eagle head
⁡
Condition 
Historic damage to the right side of the stone. 
⁡
For a similar example; the last image from the University of Oxford - Ashmolean Museum.
⁡