Currently the most popular theories speculate that Tektites have an extraterrestrial origin from the effects of large meteorites hitting the earth. Tektites are up to 35 million years old! Tektites are thought by most scientists to be formed by hypervelocity impacts of large extraterrestrial objects. These little rocks from GeoCentral are typically between 800,000 to 35 million years old. Many odd events occur during a meteor"s impact because of the tremendous heat and pressure produced. Tektites are typically black or darkly coloured and have rounded shapes, generally pitted on the outside and glassy on the inside. They may be fused glass that formed during an impact of a meteor with layers of rock on the Earth"s surface, occur in broad bands in specific localities in different parts of the world, and are often linked with meteorite craters. Tektites Space Rocks make a unique addition to a rock enthusiast"s collection or education for a young geologist.