Oval stud earrings featuring natural Blue John stones set in hallmarked 925 Sterling Silver. Made in our Sheffield workshop by jewellery designer Andrew Thomson. The stones are 9mm by 7mm and cut specially for this oval design.
Blue John (also known as Derbyshire Spar) is a semi-precious mineral, a form of fluorite with bands of a purple-blue or yellowish colour. In the UK it is found only at Blue John Cavern and Treak Cliff Cavern at Castleton in Derbyshire. During the 19th century, it was mined for its ornamental value, and mining continues on a small scale.