This Specimen has been sold.
4" Cubic Pyrite and Quartz Crystal Association - Peru
This is beautiful cluster of gleaming cubic pyrite crystals that formed in association with quartz crystals. It comes from the Huanzala Mine in Peru and the entire specimen measures 4" wide. A cool feature to this specimen is the quartz crystals that seemingly formed from within the pyrite. This type of mineral association occurs when one mineral forms after the other, in this case the quartz formed prior to the pyrite.
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, including cubes of all sizes, penetration twin cubes, pyritohedral clusters and as small druzy crystals that can exhibit a beautiful glistening effect.
Silicon Dioxide, also known 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.