Did you know? According to Wikipedia (hey, if its on the internet, it has to be true, right?) Jet is a "minor" gemstone, in that it is derived from decaying wood under high pressure. The adjective 'jet-black', meaning as dark a black as possible, derives from this stone. It is wonderfully lightweight, which makes it terrific if you want stone earrings that are a true black, and not too heavy. Just worked a custom order with Jet beads... wonderful working with the customer, the creative process, and the final result!