Yes, Oklahoma Sandstone can be used outdoors. Oklahoma sandstone is known for its durability and weather resistance, making it suitable for a variety of outdoor applications. It is commonly used for building facades, landscaping features, patio and poolside surfaces, walkways, and outdoor sculptures. The natural variations in color and texture of Oklahoma sandstone also make it an attractive choice for outdoor projects. However, it is important to properly seal and maintain the sandstone to ensure its longevity and protection against the elements.