The term "precious stones" refers to certain types of valuable, hard and durable minerals that are commonly used in jewelry or as decorative items. These gemstones have been highly valued throughout history for their rarity, beauty, and symbolic significance. Some common precious stones include diamonds, rubies, sapphires, emeralds, and opals. They are often associated with wealth, status, and luxury, and can be passed down as heirlooms or collected by enthusiasts.