Above we featured the diamond as one of the most expensive gemstones and coming in at number 1 with a price tag of over 1 million per carat is the red diamond.
Most popular precious stones.
It is also considered among the rarest of all gemstones.
Almost all the world s supply of black opal is mined in lightning ridge in new south wales australia.
Tanzanite 1 200 per carat black opal 9 500 per carat red beryl 10 000 per carat musgravite 35 000 per carat alexandrite 70 000 per carat emerald 305 000 per carat ruby 1 18 million per carat.
The hand forged gold ring came from french jeweler robert mazio and the square cut emerald is adorned with two smaller diamonds on each side of the ring.
Here is the top 10 list of most expensive gemstones in the world.
Black opal is the rarest and most popular type of opal.