One fascinating fact about rubies is their exceptional hardness. Rubies are one of the hardest naturally occurring gemstones, second only to diamonds on the Mohs scale of mineral hardness. This remarkable durability makes rubies highly resistant to scratching, chipping, and breaking, making them ideal for use in jewelry that is worn daily, such as rings and bracelets. Additionally, the hardness of rubies contributes to their longevity and enduring beauty, ensuring that they can be treasured and passed down through generations as heirlooms.
