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Katayamalite: (K,Na)Ca7Li3Ti2[Si6O18]2(OH,F)2
Comments: White katayamalite, in white albite, with brown sugilite. Inset image shows specimen under UV-SW light, albite (dull red), katayamalite (blue-white) and sugilite (non-fluorescent). Location: Iwagi Island, Inland Sea (Setonaikai), Ehime Prefecture, Japan. Scale: Specimen Size 2.5 cm. © Jeff Weissman / Photographic Guide to Mineral Species