Bright, riveting color makes this piece stand out. The yellow crystals are fibrous/acicular and arranged in radiating aggregates. This is not only a pretty piece, but an extraordinarily significant and rich specimen for the species. It can and should probably be trimmed in half for sale, as each piece would be worth more or less the same with coverage of this quality! This specimen has not been XRAYED but we feel reasonably sure, after consulting with others, about the identity of the species. If anything else, it is something rarer, in any case!