From Tanzanite to Benitoite, this article unveils the five rarest gemstones in the world that hold more than vibrant colors.

Heat treatment deepens the blue color saturation but doesn’t affect the price of the gems, as this is known to be part of the process. The mineral is found only in the foothills of Mount ...

Because the blue color is usually located on the short axis of the crystal, it’s often more difficult to cut a large, predominantly blue gem. Cutters have to decide whether to cut a large, ...

These gems are found in three different types, differentiated by their color: Red, Blue, and Green. The Isles have many gems on the map, but each type of gem is found in a specific place in Ark ...

A Thai cleaner working for a Saudi prince took the gems in 1989. A rare 50 carat blue diamond was never recovered. Three Saudi diplomats were shot dead in Bangkok following the theft. Several top ...