Mithril is a fictional material from J. R. R. Tolkien’s Middle-earth fantasy writings. Although it’s more a kind of metal and not a crystal, I wanted to include it in the collection, as it was used frequently for jewelry, including Elendilmir, the most precious and famous emblem of royalty in the North Kingdom: a white star of Elvish crystal affixed to a fillet of mithril. It’s also the base of an alloy called ithildin (“star moon”), which was used to decorate gateways, portals and pathways. It was visible only by starlight or moonlight.
” Mithril! All folk desired it. It could be beaten like copper, and polished like glass; and the Dwarves could make of it a metal, light and yet harder than tempered steel. Its beauty was like to that of common silver, but the beauty of mithril did not tarnish or grow dim.” (Gandalf)