Mineralpedia Details for Kimuraite-(Y)
Named for Professor Kenjiro Kimura at the Tokyo University in Japan who made large contributions to rare earth mineralogy. Kimuraite is a rare mineral that can be found only in Japan, Russia, and Sweden. It occurs in fissures in alkalic olivine basalts. Kimuraite crystals fluoresce bright red to purple under both short- and long-wave ultraviolet light.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/kimuraitey.pdf
Kimuraite-(Y) from Kirigo, Hizen-cho, Higashi-Matsuura-gun, Saga, Kyushu Island, Japan
White to slightly pinkish silky crystals to 5mm long in matrix.
Lilac colored pearly coatings to 1mm in a 1.5 x 1cm area on basalt. Comes with a two other labels with remarks on fluorescence. There are 6 or 7 worldwide localities.
Kimuraite-(Y) from Niikoba, Hizen-cho, Higashi-Matsuura-gun, Saga, Kyushu Island, Japan
Silky white feather-like crystal group in a 15 x 7mm area.