Cinnabar has been known since ancient times as a great source of red pigment. Cinnabar has also been known since ancient times as a great source of poison, that poison being the element mercury.
Cinnabar is the number one source of elemental mercury, and though its toxic properties have been known, they didn't stop ancient and not so peoples from using it for everything from cosmetics to carvings to pigment. That deep red is just too lovely to pass up, even if it means a closer funeral. Mining the stuff was akin to suicide.
An ancient Chinese carving done with cinnabar.
“Cinnabar is the number one source of elemental mercury.”
Text from 1570 detailing how to distill cinnabar.
Mercury is a unique metallic element that is a liquid at room temperature.
Autochthonous is derived from the Greek "autos" meaning self, and "chthon" meaning earth. Something that is autochthonous is something that is native. It is something that remains where it was created.
Amber is a truly fascinating stone. I became enthralled while traveling in Poland. Amber is native gemstone of Poland and you are sure to see it wherever you go. From jewelry to raw stones, you can find it everywhere!
"Steven Universe" is a show about aliens known as Gems. Every one of these alien characters is named and designed after a specific gem or mineral. In many circles, gems and minerals hold special meaning.