This Specimen has been sold.
3.3" Gleaming Cubic Pyrite Cluster with Quartz - Peru
This is beautiful cluster of gleaming pyrite crystals that seeming peer through the tall quartz crystals. The matrix is composed of fine grained pyrite crystals that give off a unique shine. It comes from the Huanzala Mine in Peru and the entire specimen measures 3.3" long by 1.8" wide. There is a small association of sphalerite along one edge of the specimen.
The mineral pyrite or iron pyrite is commonly referred to as Fool's Gold because its metallic luster and pale brass-yellow hue give it a superficial resemblance to gold. In the old mining days, pyrite was sometimes mistaken for gold. Pyrite is the most common of the sulfide minerals with the chemical formula FeS2. Pyrite crystals occur in many shapes and habits. Smaller (druzy) crystal aggregates may give off a beautiful glistening effects, and larger crystals may be perfectly formed, including fascinating cubes, penetration twins, and other interesting crystal forms.
Silicon Dioxide, also know as SiO2 or Quartz, is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich, hot watery solutions called hydrothermal environments, at temperatures between 100°C and 450°C, and usually under very high pressure. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountains forming, and can be hundreds of millions of years old.