This is a richly colored piece of carnelian agate, polished into the shape of a heart. The carnelian is mined in Madagascar and has wonderful deep red and orange colors.
is a semi-precious variety of chalcedony that features an orange or orange-red coloration. It's name is believed to come from the Latin word carneus, meaning 'flesh colored'. The reddish color is due to the presence of iron oxide impurities in the silica which makes up the chalcedony.
Carnelian is one of the oldest known gemstones. It was widely used in ancient Rome to make insignia and seals for imprinting on letters or important documents because hot wax does not stick to carnelian.