Prized by mystics and spiritual seekers for its intensely high frequencies and spiritual connectivity, Moldavite is a gift from an ancient meteorite and is perhaps one of the rarest and most powerful, high frequency crystals ever found. -- Until you get used to the high frequencies of this magical crystal, you may have to work up to being able to work with your crystals for long periods of time. Common "side effects" include headache, vertigo, slight nausea, ringing in the ears, sleeplessness and very vivid dreams. -- These are the same high quality Moldavite crystals I use in my orgonite pendants and I guarantee they are 100% authentic.-- Both crystals are approx. 5/8" long by 7/16" wide by 1/4" thick.