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Georgian Blue Glass & Old Mine Cut Diamond Bague au Firmament Ring

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An unusual Georgian ring that was made circa 1780-1800. It has a curved Bristol blue glass plaque of vibrant foiled cobalt blue glass, which is a rich blue glass coloured with cobalt oxide to create its distinctive hue and vibrancy. It has been set with an old mine cut diamond in a silver pinched setting. The celestial blue ground evokes the night sky and the old mine cut diamond twinkles like a star. This style of ring was known as ‘Bague au firmament” “Ring of the Heavens” and was originally popularised by Marie Antoinette hence the French name

Written by Olly Gerrish


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Ollys Pick

These rings are highly sought after today

Date & Origin


Very Good




GoldSilver Diamond Paste


Unmarked, tested to 9ct gold


Top 3cm by 1.8cm
Diamond 0.25 carats

Item Number


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4.9 Out of 329 Reviews