Ruby

Ruby is the red-colored form of Corundum. It is also called “Tara”. It is a gemstone used for making gemstone jewelry. It's slightly more complicated than common quartz but not complex as the alexandrite. The red color of ruby is due to the chromium content.'s. It is a transparent gemstone in the top light of the gem.

Corundum is a mineral that is valued for the hardness of its crystals. It is the second hardest mineral on earth, only surpassed by diamonds. However, Ruby crystal has specific properties which give it an edge over a diamond.