Honey Citrine glows from within while The Septarian has a drusy crystaline surface that sparkles. Septarian is a concretion that formed 50 million years ago when a sea creature dies and fell to the bottom. Minerals are attracted to the calcium and build up, lastly forming a crystaline surface. These are found in Dallas, Texas where there was once an ocean' when they dig the foundations of skyscapers. Bezel setting, with hammered texture frame.