The origin of Libyan desert glass found scattered in an Egyptian desert has puzzled scientists for years. But a new look at the glass structure reveals its meteoric formation.
A meteorite hitting Earth at many kilometres per second puts 'ground zero' target rocks under immense pressure. A shock wave faster than the speed of sound can result – and new materials created.
Zirconia is a mineral with a crystal structure made from the elements zirconium and oxygen. It looks pretty like diamond, but is only worth a fraction of the value.