This single earring by Skomer Studio is a great option if you wear multiple earrings or like to mix and match.

It also has a charitable aspect: “This barbell earring features a dainty pearl and a shimmering teardrop amethyst connected by a recycled 9kt gold bar. Sold as a single stud so you can mix and match with other barbell studs for a playful look. Handmade to order using recycled 9kt gold from our studio in London, and also available in recycled sterling silver. 10% of all profits from sales are donated to charity, split equally between The Maya Centre and the Marine Conservation Society. For more information please visit our values page.”

This sells for £140.