The Amethyst Gemstone is shown above. A gem species is a type of mineral species. Well over 140 mineral species have been utilized as gems. Throughout history, humans have selected these minerals for their beauty and durability and used them for adornment.

One of the most popular traditional jewelry stones, ruby is exceptionally durable. Though most people think of sapphires as being blue, the gem can be found in almost any color, due to the presence of trace amounts of metals such as iron, chromium, and titanium