Yes, Dominican Republics colonial coral stone can be used outdoors. It is a very durable and weather-resistant material, making it suitable for various outdoor applications such as walls, facades, patios, pool decks, and walkways. The unique coral stone texture and natural warm color add a touch of elegance to any outdoor space. Moreover, it is known for its resistance to saltwater, making it a popular choice for coastal areas. However, it is important to note that proper installation and maintenance are essential to ensure its longevity and performance in outdoor environments.