The name Tektite comes from the Greek words “tektos” or “melted”. Tektites are similar to silica-enriched igneous and certain types of sedimentary rocks. Depending on the type of Tektite, SiO2 ranges from 64 to 84% with a mean of 73.09% Chemical Composition: mainly SiO2. They have a transmitted light color of dark greenish- beer-bottle brown, olive- to emerald-green, golden amber-brown, to straw yellow. Tektite stones have been used by talismans to ward off evil by cultures who considered them to bring protection and good luck. Tektite is not associated with birthstone. The good gem dealer must tell the source of nice tektites for sell. The best way You should buy colored gemstones and loose gemstones from a reliable gemstone dealers.