Semi-precious stones are gemstones that are not classified as precious, which typically include diamonds, rubies, sapphires, and emeralds. They are valued for their beauty, rarity, and durability, but are generally more abundant and less expensive than precious stones. Common examples of semi-precious stones include amethyst, turquoise, garnet, and opal. These stones are often used in jewelry, decorative items, and healing practices. Each semi-precious stone has unique properties and colors, making them popular choices for personal expression and adornment. Their appeal lies in their variety and the different meanings attributed to them in various cultures.