Moldavite:  Moldavite is one kind of tektite . 
Tektite from Moldau river valley in Czech Republic is called  moldavite. 
Tektites are estimated to have occurred about 14 million years ago. They are believed to be created by meteor that impact with enough velocity. The impact create immense heat &pressure that it vaporizes itself and surrounding material. These Vapors are ejected back into the upper atmosphere where they solidity and rain back down a solids as tektite(moldavite)
Tektite (moldavite) benefits communication, astral travel, meditation &lucid dreaming.
Tektite (moldavite) helps to open the energy channels in spirit &physics