Bohemians now reside in the Czech Republic and are the first to employ an olive-green rock. In southern Germany, sand and minerals were superheated 15 million years ago when a meteorite crashed with them. There are three grades of Moldavite: high, medium, and regular.  Moldavite, the most powerful crystal in the world, was formed by rapid heating and cooling. The Moldavite Jewelry or Moldavite Engagement Ring is thought to have high vibrational energies because of its cosmic link.  Both physically and mentally, this gem has numerous therapeutic qualities.