Moldavite is a bottle-green, glass-like mineral formed almost 15 million years ago in the impact that created the Nördlinger Ries crater in western Bavaria. Moldavite is classified as a tektite, as it is found widely scattered up to 280 miles away from the original crater. Moldavite is the only impactite commonly used in jewelry, as it is just hard enough to cut into faceted gems. The highest-quality moldavite pieces have a delicate fern-like pattern.