The royal one is the most precious black opal in the world valued at 3 million.
Most famous precious stones.
In order to maximize color potential seek stones 5 carats or greater.
Most tanzanite owes its color intensity to heat treatment.
From the famous indian diamond in the british crown to a football sized carved sapphire check out these exquisite precious stones from around the world.
1 koh i noor diamond a british crown jewel the koh i noor is a 106 carat diamond which was once the largest diamond in the world.
The elusive gemstone weighs 306 carats.
In fact it went unreported for 14 years before the miner who had discovered it decided to sell.
The average price per carat is 1 200 for high quality stones.
Jeremejevite al 6 b 5 o 15 f oh 3 is an aluminum bearing borate mineral with associated fluoride and hydroxide it was first found in the adun chilon mountains in siberia in 1883.
This is one of the largest star sapphires in the world and the most famous.
The elusive gemstone weighs 306 carats.
This gem has.
The most prized color is a pure blue that is almost indistinguishable from blue sapphire.