Gemstones are precious or semi-precious stones that are often cut and polished for use in jewelry and decorative items. They are valued for their beauty, rarity, and durability. Common examples include Diamond, Ruby, and Sapphire, each possessing unique characteristics and colors that make them desirable. The formation of gemstones occurs over millions of years through geological processes. They can be found in various locations around the world, with some regions being famous for specific types. Collectors and jewelers often seek out these natural wonders for their aesthetic appeal and investment potential.