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

Many Enstatite stones have heavy inclusions, or materials, trapped inside. This one has very few, which is another reason for its unusually high price. Highlights: Axinite is considered a rare ...

Gemstone seekers in Chaung Gyi Village unearthed the tiny reddish-orange crystal, which later caught the eye of a gemologist.

Diamonds are one of the best-known gemstones formed deep inside the Earth, because the formation of natural diamonds requires that a collection of carbon atoms be exposed to extremely high ...

Tanzanite is only found in northern Tanzania and is used to make ornaments. It is one of the rarest gemstones on Earth, and one local geologist estimates its supply may be entirely depleted within ...