Many minerals form beautiful crystals, but the most prized of all are gemstones. Uncut gems often look fairly ordinary–like rocks. It's only when they are cut and polished that they obtain the ...

Some gemstones are also minerals, such as that classic rock diamond, but there are some gemstones that aren’t classed as minerals. A fancy example is pearl, a popular choice in the jewelry industry.

Apart blue, green, red and yellow, any other fireworks color can be obtained by a mineral mix. For example, purple can be ...