Emerald is a beautiful gemstone that is known for its vibrant green color. It is a type of beryl, a mineral that is found in various parts of the world, but is most commonly found in Colombia and Zambia. Emerald has a Mohs hardness of 7.5-8, making it a durable gemstone that is suitable for use in jewelry. It is also the birthstone for the month of May, making it a popular choice for those with a May birthday. Overall, emerald is a stunning gemstone that is highly prized for its beauty and durability.