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