Ruby, a gem-quality corundum, is traditionally used as one of the key gemstones in religious rituals and royal jewelry. Ruby is mainly composed of aluminum oxide (Al2O3), and its red color comes from chromium (Cr). The only natural gemstone without chromium is blue sapphire.
Ruby comes from the Latin word Ruber, which means red. It is known as the "king of gemstones" in India and is a member of the corundum family. Like sapphire, it is the second hardest gemstone after diamond. The fiery red hue of ruby ​​has fascinated people all over the world.
Natural rubies mostly come from Asia (Myanmar, Thailand and Sri Lanka), Africa and Australia, and some are also produced in Montana and South Carolina in the United States. Natural rubies are very rare and precious. This gemstone reflects an intense incandescent light, and its subtle tones range from light pink to deep red, and it is even more unique because of its rare characteristics. High-quality rubies are even rarer than diamonds.