Stuart is a specialist in responsibly mined and fully traceable coloured gemstones, mainly sourced directly from mines in Sri Lanka and Tanzania. He runs gem trading companies Nineteen48 ( www.nineteen48.com ) and Crown Gems, as well as being one of the co-founders of Fair Luxury ( www.fairlux.co.uk ), a group focused on positive change in the jewellery industry and a key member of the Moyo Gemstones project ( www.moyogems.com ).