In some cases, a gemologist can tell what gemstone is before him by looking at it, but this may not always be possible. Two different gemstones such as blue topaz and aquamarine may look nearly identical. This means that gemologists are often required to perform a series of tests to determ...
Tourmaline is a gemstone that comes in a variety of colors. Though most people are familiar with pink tourmaline, it also comes in...
Tourmaline is a gemstone that comes in a variety of colors. Though most people are familiar with pink tourmaline, it also comes in...