This Former Luxury Gem Bathes in the Orange Glow of History

TODAY THE TERM “luxury goods” means Louis Vuitton handbags, Chanel No. 5 perfume and high-end jewelry, but there was a time when it meant frankincense and myrrh and me. This was especially the case in and around the old Muslim world, because of the way I could be carved and used as a seal. There is even a story that the prophet Mohammed wore a silver ring set with a seal carved from yours truly. Agate, aventurine, chrysophrase … I share numerous characteristics with my chalcedony brothers, but none bathes in the same deep orange glow of history as I do.

Who am I?