Kozoite-(Nd) with Lanthanite-(Nd), and Kimuraite-(Y)
Niikoba, Hizen-cho, Karatsu City, Saga Prefecture, Kyushu Region, Japan
Cabinet, 7.5 x 5.0 x 3.0 cm
Ex. Paulo Matioli
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Here we have a trio of unusual rare earth-bearing carbonate minerals in a matrix of alkali olivine basalt from Japan. The specimen is host to white to off-white, tufts and aggregates of acicular to fibrous kozoite-(Nd), lanthanite-(Nd), and kimuraite-(Y) that occur as vesicle fillings. The specimen originates from Niikoba, Hizen-chi, Higashi Matsuura-gun, Saga Prefecture, Japan, the type locality for both kozoite-(Nd) and kimuraite-(Y). Ex. Paulo Matioli collection.