Ruby and Sapphire are two popular gemstones that belong to the mineral species corundum. Ruby is the red variety of corundum, while Sapphire refers to all other colors of corundum, except red (which is ruby). Sapphire can come in many different colors, including blue, yellow, pink, purple, and green. Both Ruby and Sapphire are prized for their hardness, durability, and beauty, and have been used in jewelry and other decorative objects for centuries.
