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.
Her 4 carat emerald ring includes an unusual setting that is one of a kind.
Almost all the world s supply of black opal is mined in lightning ridge in new south wales australia.
The main characteristic that will differentiate black opal from common opal is its body tone.
It is also considered among the rarest of all gemstones.
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.
Black opal is the rarest and most popular type of opal.