This Specimen has been sold.
Lustrous, 1.9" Cubic Pyrite Crystal Cluster with Chalcopyrite - Peru
This is beautiful cluster of gleaming cubic pyrite crystals. It comes from the Huanzala Mine in Peru and the entire specimen measures 1.9" wide. There are chalcopyrite crystal formations scattered throughout this 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, including cubes of all sizes, penetration twin cubes, pyritohedral clusters and as small druzy crystals that can exhibit a beautiful glistening effect.
Chalcopyrite is a brass-yellow colored mineral which is one of the most important ores of copper. When weathered chalcopyrite loses it's metallic luster, turning a gray-green color. When acids are present the tarnish can develop a red to blue to purple iridescence.