Due to its rarity it can be extremely expensive. Red beryl also known as bixbite or red emerald is so rare it is estimated by the utah geological survey that a single such gem is uncovered for every 150 000 gem quality diamonds. Said to be about 1 000 times rarer than diamonds tanzanite is a deep blue gemstone named after tanzania where it was discovered for the first time in 1967. It was first discovered in 1907. It s a blue barium titanium silicate mineral that fluoresces under uv light.
Discovered in 1902 in the southern region of madagascar grandidierite is an extremely rare gemstone. Couch discovered it he originally believed that is was a sapphire due to its resemblance of color. In 1985 it was declared the state gem of california. Also it is an exquisite and most valuable gemstone. In addition benitoite rarely exceeds 2 carats.
Top 20 rarest gemstones in the world in order by value 1. Benitoite is a rare blue to purple gemstone that was discovered in 1907 in san benito mountains in california. Top 20 rarest gemstones in the world in order by value 1. Discovered in 1902 in the southern region of madagascar grandidierite is an extremely rare gemstone. Due to its rarity it can be extremely expensive.
