Blue John is a gemstone that was first discovered over two thousand years ago by the Romans. A polycrystalline fluorospar that has distinct bands of purple, blue, golden yellow and white, Blue John is a rare gemstone that only found in Derbyshire.
The origin of the name 'Blue John' is believed to have come from the French 'blue et jaune', meaning 'blue and yellow', which was though have been later abbreviated to 'Blue John'. Steeped in rich history, Blue John has been displayed in stately homes throughout the country for centuries, made world famous by the craftsmanship of Mathew Boulton in the late 18th century. Its wonderful colour combination and distinct banded patterns are captivating set into jewellery.