Sommerville, Maxwell. Engraved Gems: Their History and an Elaborate View of Their Place In Art. Maxwell Sommerville, 1889.
Reference
- Object[7]
- no[7]
- gem[7]
- graeco-roman[3]
- amethyst[1]
- carnelian[1]
- chalcedony[1]
- gold[1]
- heliotrope (mineral)[1]
- onyx[1]
- paste[1]
- sardonyx[2]
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