HUEBNERITE QUARTZ CRYSTALS
Great looking Metal Specimen of Huebnerite Quartz Crystals, showing amazing crystal formations protruding out of the interlacing quartz matrix. Slight translucency on edges of Huebnerite crystals with some minimal yellow sulfur coloured oxide on surfaces or protected crevices and in the Quartz. This is a very collectable piece. Huebnerite is an ore of Tungsten. Tungsten is used to make fake Gold bars. That is because Tungsten has the same specific gravity as gold does. The best way to test for this type of fakery is to drill a very small hole in the bar.
Mundo Nuevo Mine, La Libertad, Peru.
5cm x 4.7cm x 3.5cm, 38g.
Huebnerite has 80% or more Manganese and is an ore of Tungsten. Wolframite is the name of the series. The name is applied to specimens between the two end members and indistinguishable specimens. Most specimens found in nature fall within 20 – 80% range of the series and these are termed Wolframites (Fe, Mn)WO4. Ferberite is 80% or more iron. Iron content causes the dramatic differences between Ferberite and Huebnerite (Wolframite is intermediate). Ferberite is black , has a black streak and is opaque with a submetallic luster. Ferberite is denser, has crystals with a different elongation and can be weakly magnetic. Huebnerite is light in colour, with a lighter streak, more transparent and less dense. Named in 1865 by Eugene N. Riotte from Germany for Friedrich Adolph Hübner.