This coin is part of the Hawaii series issued in 1985 by the United States of America. It is a proof coin, which indicates that it was produced using a specialized minting process designed to produce coins with a high level of detail and a mirror-like finish. The coin does not have a specified denomination or mint mark, and its production type is classified as 'N/A.' With a weight of 31.10 grams, this coin is likely composed of a material that is not specified, but it can often be assumed to be a composition typically used for commemorative coins such as silver or a copper-nickel blend, though in this case, it’s noted as 'N/A.' Interestingly, the coin has a reported mintage of 0, which could suggest that it was either never released for circulation or that production numbers are unlisted or unknown. Its dimensions, including diameter, width, and height, are also not provided, indicating it may not conform to standard sizes for circulating coins. Overall, this coin represents a unique collectible item, particularly for enthusiasts of Hawaiian history or numerically interesting coin series. As it stands, without tangible specifications for certain properties, this coin may hold a special place within collections that focus on unique minting characteristics or proof creations from the 1985 Hawaii series.