These gold pyrite geode eggs come from Peru and are polished to expose natural crystals growing within. Hundreds of tiny glimmering crystals can be seen nestled in the cavities of these eggs. Pyrite is also known as fool's gold.

The mineral pyrite, or iron pyrite, is an iron sulfide with the formula FeS2. This mineral's metallic luster and pale-to-normal, brass-yellow hue have earned it the nickname fool's gold due to its resemblance to gold.