Here are the top 5 hard gemstones:
1. Diamond: Hardness is the resistance of a gem to scratching also detrition. The diamond is the hardest gemstone known in power. Diamond is as well the most valued gemstone in comparison to other gemstones.
April birthstone is Diamond
2. Sapphire: It is the next hardest gemstone known to mankind. Sapphire is well known in general common as being blue yet can be someplace any color even colorless.
September Birthstone is Sapphire
3. Ruby :Ruby is the third hardest natural mineral known to humanity. Ruby is the red diversity of corundum.
July Birthstone is Ruby
4. Emerald:Fourth hardest gemstone known to mankind. The amazing green color of emerald is peerless.
May Birthstone is Emerald
5. Alexandrite:Fifth hardest gemstone in the world. Alexandrite is a very rare mineral and it's occurrences are finited.
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