Categorization
Minerals are categorized by their hardness, color, shine, magnetic properties, density, color and how they break.
Crystals
Crystals are minerals that have formed into specific shapes with flat sides. It is a common misconception that crystals must be clear.
Diversity
According to the GMB Services website RocksForKids.com, 3,000 different minerals have been identified on Earth.
Crystal Shapes
The specific shape of a crystal is determined by what mineral formed it.
Magic
There are many people who believe that minerals and crystals possess mystic powers. Diamonds, for example, are believed to offer protection from ghosts and magic.