Abundant, acicular and bright lemon yellow haiweeite partially coated by/included in clear to white gypsum. Displays bright neon green fluorescence under both longwave UV (blacklight) and shortwave UV. Strongly radioactive (so it cannot be shipped internationally) because haiweeite is a hydrous calcium uranyl nesosilicate hydroxide - Ca(UO₂)₂[Si₅O₁₂(OH)₂]·6H₂O. (May also be the dehydrated analog metahaiweeite but these two species cannot be distinguished visually.) This rich sample is highly aesthetic and very displayable. Excellent condition.