Blue nephrite consist of microfibrous Strontian (~3.5 % SrO) Potassicrichterite, divided from whitish porcelaneous Quartz-Microcline agregate by greenish layer of Potassic-magnesio-arfvedsonite. Such rock has trade name "dianite" in honour of Diana princess of Wales. Polished plate 8.5x4x1 cm. Collected by Olga A. Ageeva on Aleksandrovskii stream on Kedrovyi massif near famous Murun massif. Pavel M. Kartashov collection (#2108) and photo.