What is a gem?

A gem is a piece of mineral crystal or rock that is cut and polished for use in jewelry or other decorative objects. Gems can be found in a variety of colors and can have different properties, such as level of hardness and clarity. Some of the most popular gems include diamonds, rubies, emeralds, and sapphires. The value of a gem depends on its rarity, quality, and size. Gems are often used as symbols of love and are often given as gifts for special occasions such as anniversaries, birthdays, and weddings.