Almost all the world s supply of black opal is mined in lightning ridge in new south wales australia.
Most popular precious stones.
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.
Here is the top 10 list of most expensive gemstones in the world.
Black opal is the rarest and most popular type of opal.
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.
Her 4 carat emerald ring includes an unusual setting that is one of a kind.
It is also considered among the rarest of all gemstones.