Tektite is a generic name for the substance formed by a piece of rock falling through the atmosphere. Tektites have been prized for thousands of years as magical extra terrestrial minerals that have fallen from the sky. Atmospheric friction generates intense heat, and on impact with the Earth, a molten ‘glass’ is formed that cools into a hard, semi-translucent material.
Some pieces may have fallen to earth as molten meteor fragments. Most we believe are actually terrestrial minerals that have been thrown high into the atmosphere by powerful volcanic eruptions. However, both are possible and, therefore, I treat each piece I find on its own merits.