Precious metals and gems are valuable natural resources often used in jewelry and investment. Precious metals, such as gold, silver, and platinum, are prized for their rarity, durability, and resistance to corrosion. They are also used in various industrial applications, including electronics and dentistry. Gems, like diamonds, rubies, and sapphires, are typically cut and polished to enhance their beauty. These stones are classified based on their hardness, rarity, and color. Both precious metals and gems have been sought after for centuries, symbolizing wealth and status in many cultures.