Untreated Montana Sapphire Dainty Ring 950 Platinum size 7

This natural silvery-blue sapphire is untreated/unheated, from Montana, USA. It is a 6x4mm oval of just over 1/2ct. It is set in a dainty 95% platinum setting that is a size 7 weighing 1.5g. It is British hallmarked and will come with a certificate of authenticity.