Vayrynenite, a very rare beryllium mineral, has been recognized only in a few localities abroad (e. g. in Viianiemi pegmatite, Fihland). In China, the mineral was first found by the authors in 1984. Occurring within the quartz-muscovite-spodumene pegmatite (Type IV ) of the Nanping rare metal granite pegmatite field, Fujian Province, it can be seen in fissures of coarse primary beryl, being a product of late hydrothermal activity of the pegmatite.This paper systematically studies mineralogy of the Nanping vaeyrynenite,including its mode of occurrence, paragenetic association, physical and optical properties, chemical composition, X-ray diffraction pattern and infrared absorption spectrum. The distinctive features of this mineral for its identification are also indicated.