Sommerville, Maxwell. Engraved Gems: Their History and an Elaborate View of Their Place In Art. Maxwell Sommerville, 1889.
Reference
- Object[6]
- no[6]
- gem[6]
- swivel ring[1]
- graeco-roman[2]
- italian[1]
- roman[1]
- chalcedony[3]
- chrysoprase[1]
- gold[1]
- malachite[1]
- onyx[4]
- cameo[6]





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