Mrs Rodgers also discovered some of her jewellery was missing, including gold rings, earrings, chains and a rectangular pendant given to her by her late husband, Roy, on their 50th wedding anniversary.

BBC: Maud Rodgers in her home

But Finnish scientists from the Helsinki City Centre for the Environment warn that many earrings exceed these limits - including some billed as gold or surgical steel.

BBC: Earring

The Rebel Chique brand is available in at least six colors (including colorless) and a variety of cuts and sizes for rings pendants and earrings.

FORBES: Lab-Grown Diamond Brand Taps Young, 'Rebellious' Crowd