They are also exceptionally scarce.
Are rubies rare.
Forget diamonds emeralds and rubies.
The emery on your emery boards and sand paper may contain.
Today s discerning collectors are looking for jewelry that emphasizes rare striking and sometimes almost impossible to find stones.
While rubies from thailand contain relatively high iron content which can result in overly dark reds with brownish or purplish overtones the geological conditions in myanmar generally produce rubies with very little trace iron.
Ranking a 9 on the mohs scale of hardness diamond is a 10 corundum has been mined extensively for abrasives.
Now corundum is a fairly common mineral.
In nature diamonds are rare but not so in the gem world.