"Light of the Desert", the world's largest faceted Cerussite gem carats), Royal Ontario Museum. Cerussite is one of the only gems with adamantine (diamond-like) luster. Very fragile. ITS THE ARKENSTONE!
I'd only go to Australia to see this. One of the world’s largest amethyst geodes, the Empress of Uruguay, is located in Australia’s Crystal Caves. It stands an alarming eleven feet tall and is filled with magnificent, deep violet crystals.