Columbia subject headings:
Cameos--Private collections--Catalogs.
Gems--Private collections--Catalogs.
Intaglios--Private collections--Catalogs.
Harvard subject headings:
Cameos--Private collections--Catalogs.
Gems--Private collections--Catalogs.
Intaglios--Private collections--Catalogs.
Princeton subject headings:
Cameos--Private collections--Catalogs.
Gems--Private collections--Catalogs.
Intaglios--Private collections--Catalogs.