Tektite
The name tektite comes from the Greek "tektos=melted". It was created in 1900 by the Viennese geologist Franz Eduard Suess. Tektites are always named after the areas where they are found, for example australite, bediasite, georgianite or indochinite. They are formed when giant meteorites hit the earth's surface.
They are mostly dark to black, rarely olive green. They are not round, but mostly scarred to deeply grooved or corroded.
Mineral class of oxides
Formula: SiO2 + Al2O3 + Ba,Ca,Fe,K,Mg,Na,Sr
Mohs hardness: 5.5
Density: 2.27 - 2.52
Cleavability: none, conchoidal fracture
Stroke colour: white
Transparency: translucent to opaque
Healing effect
Letting go, promotes knowledge of being a spiritual being, strengthens empathy and clairvoyance, spontaneity, impulsiveness.