The Atomic Origins of Trinitite Rock.
Trinitite is a green-red glass formed by sand that was melted by the heat of atomic bombs. It contains silicate dioxide, melted quartz grain, feldspar, and other minerals. Trinitite is mildly radioactive and can be used as forensic evidence to understand the composition and origin of nuclear bombs. Scientists have recently discovered that it contains "forbidden" quasicrystals, which have an unusual atomic structure not seen in typical crystals. Quasicrystals are known to be formed by meteorites and in labs, but atomic blasts also pack enough punch to create them.