How many precious stones are there in the crown jewels?

Which is the most important gemstone in the British crown jewels?

The Koh-i-noor diamond is the largest of all the diamonds that cover Queen Elizabeth I’s crown (the Queen Mum was Elizabeth I; the reigning monarch is Elizabeth II).

Where did the gems for the Crown Jewels come from?

For centuries, India was the world’s only source of diamonds—all the way until 1725, with the discovery of diamond mines in Brazil. Most of the gemstones were alluvial, meaning they could be sifted out of river sands, and rulers of the subcontinent embraced their role as the first diamond connoisseurs.

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