Rutile (Var: Struverite)

Unknown Owner

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This rare earth oxide appears not to be a valid species anymore, but rather a variety of Rutile. It is closely related to Ilmenorutile, however the presence of Tantalum makes for a very unique chemistry. This piece features a very sharp, well formed, dark brownish-black crystal of "Struverite" measuring 1.0 cm on massive translucent Quartz matrix. These specimens are no longer being found.