Moldavite is the product of a meteor collision with Earth nearly 15 million years ago. It fell over what is now called the Moldau River valley in Czech Republic. These green gems are among the most rare minerals on earth. They have been prized by humans for thousands of years and are still given as gifts from royalty to royalty. In legend, it is believed Moldavite was the green stone in the Holy Grail and has the power to quicken one's spiritual evolution.