Pyrochlore, Calcite: Vein #40, Veshnovogorsk, Casagunsk Oblast, Russia

Description

Species: Pyrochlore, Calcite
Locality: Vein #40, Veshnovogorsk, Casagunsk Oblast, Russia
Dimensions: 4.2 cm x 5.3 cm x 11 cm

Excellent large specimen of lustrous black pyrochlore crystals to 1 cm. which are nicely exposed along a vein of contrasting white calcite, from Vein #40, Veshnovogorsk, Casagunsk Oblast, Russia. An excellent example of this uncommon Niobium mineral from a classic Russian locality for the species located in the Ural Mountains. Ex. Eric Quinter Collection.