Rubies and emeralds are two of the most precious and sought-after gemstones in the world. Both STONES are highly valued for their beauty, rarity, and durability. Rubies are a variety of the mineral corundum and are typically found in shades of red, while emeralds are a variety of the mineral beryl and are usually found in shades of green. Both STONES have been used in jewelry and other decorative items for centuries, and they remain popular today.