Although not mineralized, it is sometimes considered and used as a gemstone. Most of the world's amber is in the range of 30–90 million years old. Semi-fossilized resin or sub-fossil amber is called copal.
A few years ago, De Ferranti was comissioned to reproduce Pietre Dure inspired Amber 'rondelles' from the Amber room in St. Petersburg, Russia
By Appointment
DE FERRANTI
South Park Studios - Suite 10
88 Peterborough Road, London SW6 3HH
United Kingdom