An exquisite 2,000-year-old sapphire ring which is thought to have belonged to Roman Emperor Caligula - and is one of the 'Marlborough Gems' - is being sold for close to £500,000. The sky blue hololith, made from a single piece of the precious stone, is believed to have been owned by Caligula, who reigned from 37AD until his assassination four years later. The face engraved into the bezel is thought to be his fourth and last wife Caesonia.
An exquisite 2,000-year-old sapphire ring which is thought to have belonged to Roman Emperor Caligula - and is one of the 'Marlborough Gems' - is being sold for close to £500,000.
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