Unknown Mineral Found Inside Russian Meteorite Gold hunters in Russia come uncovered an unknown mineral. The rare space-borne rock contains an element never seen on Earth. The pebble is being called the 'Uakit Meteorite'. Researchers find it is made of 98-% of kamacite. This forms in space and is only found in meteorites. It’s composition suggests it may have formed at temperatures over 1,800°-Fahrenheit. Some publications are reporting the mineral is harder than a diamond.