Rubí is a precious gemstone known for its vibrant red color, which comes from the presence of chromium. It is a variety of the mineral corundum, and its hardness makes it one of the toughest gemstones, ranking 9 on the Mohs scale. Rubies are often used in jewelry and are highly valued for their beauty and rarity. The most sought-after rubies are those with a deep red hue, often referred to as "pigeon blood." These gemstones are primarily found in countries like Myanmar, Thailand, and Sri Lanka. Rubies have been cherished throughout history, symbolizing love, passion, and power.