Your Certificate of Authenticity

With many poor gemstone imitations and low-quality jewellery products available online, we take our commitment seriously to ensure only the finest quality and the origin of our Derbyshire Blue John is guaranteed and supplied.

To help you buy with confidence, we are the only online jewellery boutique offering a Certificate of Authenticity with each handcrafted piece of Blue John jewellery.  Backed by our membership of The National Association of Jewellers and The Gemmological Association of Great Britain, it provides detailed information on product title, gemstone/banding comments and product code.

Signed by a fully trained and authorised workshop jewellery technician, it is intended to provide a lifetime accompaniment and provenance to your new Blue John jewellery piece – alongside the UK hallmarks on the piece itself.

To ensure the COA remains safe, yet viewable at any time, it comes presented in its own clear and protective case.