the famous Czech “gem” that fell to us from the sky
From a geological point of view, it belongs to the group of tektites, natural glasses. The Greek term tektós means “molten or melted”.
Glass is a melting product that has been cooled to a solid phase without crystallization. It is an amorphous solid without regular arrangement.
The glassy appearance is created by a smooth transition from the liquid to the solid state.
One theory is that tektites formed by hitting a body from space – an asteroid that blew up a mass of Earth’s surface layers when it hit Earth.
The enormous energy of the impact at a speed of approximately 11 km / s caused the melting and evaporation of the target rocks and led to the ejection of part of the mass into the upper atmosphere and partly into space.
The Ries near Stuttgart in Germany is considered to be the impact crater of tectites in the Central European fall field of moldavites.
Its age, corresponding to the age of moldavites, has been calculated at 14.7 million years.
The second theory is that moldavites formed on the moon and landed on Earth as meteorites.
Thanks to its mysterious origin, it is popular with collectors and esoterics, who attribute it to extraterrestrial origin and other attributes associated with it.
Moldavites were described almost 250 years ago from the Vltava basin.
They were already used by people in the Neolithic for decorating and making tools.