Yttrotantalite is a rare, rare earth oxide rich in yttrium and is similar to tantalite. This old-time specimen, with waxy lustre is from the Type Locality - the Ytterby pegmatite in Sweden. The brick-red cubes filling the little vug are pyrite crystals. About 10 rare elements were discovered here. Ex. Mullane Collection and comes with a faded, old label. Classic, old material.
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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