There would be no bright and colorful fireworks without rocks and minerals. A firework is produced by launching a shell containing ... On Earth, manganese is never found as a free element, but ...

In general, mineral particles are small, having formed within confined areas such as lava flows or between grains of sediments. Large crystals found in geodes and other rocks are relatively rare.

Even if the bone or shell dissolves, the mineral deposits in the shape of the body structure remain. Besides rock, fossils may be found as the result of an organism being entombed in ice ...

Remember, "skeletons" include bone, the protein shell of crabs or insects, the sturdy shells of clams, or the massive rock secreted by coral. A. Apatite (calcium triphosphate): This mineral makes ...