Semi-precious stones are natural gemstones valued for their colour, clarity, and durability, but are generally more abundant than traditionally classified precious stones like diamonds, rubies, sapphires, and emeralds. Examples include amethyst, turquoise, topaz, garnet, and aquamarine. These stones are widely used in jewellery due to their variety, affordability, and versatility. Many also carry symbolic meanings, making them popular for both decorative and personalised jewellery designs.