Forget diamonds emeralds and rubies.
Are rubies rare.
Rubies and sapphires are different colored varieties of the mineral corundum.
The emery on your emery boards and sand paper may contain.
Ranking a 9 on the mohs scale of hardness diamond is a 10 corundum has been mined extensively for abrasives.
In nature diamonds are rare but not so in the gem world.
Today s discerning collectors are looking for jewelry that emphasizes rare striking and sometimes almost impossible to find stones.
Now corundum is a fairly common mineral.
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.