Seal matrix of Alaric II, King of Visigoths, 484–507 — sapphire intaglio in 16thC gold ring: http://www.kornbluthphoto.com/Alaric.html pic.twitter.com/GA1Zslil0v
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The surviving top of the 9thC Escrain de Charlemagne—aquamarine intaglio of Julia Flavia, d.AD 91, sapphires+pearls: https://commons.m.wikimedia.org/wiki/File:Julie,_Intaille_CM.JPG …pic.twitter.com/WyizjNuG8J
I fear this isn't a topic I know much about, but are certainly Byzantine etc artefacts with pearls etc, so...?
Your pictures of artifacts are beautiful. Please keep them coming. Cheers! 
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