Technically, a manmade relic. Someone had trashed it, but Riko found it and decided to carry it as a shield. A grade 3 artifact, charcoal sand, was made into bars and attached to the top of an umbrella, making it look somewhat like shingles on a roof. It was put together poorly, resulting in the grade being lowered. The umbrella possesses the strong but lightweight properties of the charcoal sand its made out of.