What is “Fool’s Gold?”

​”Fool’s Gold” is a common nickname for pyrite, a mineral composed of iron sulfide (FeS₂). Its metallic luster and brass-yellow hue closely resemble real gold, often misleading inexperienced prospectors. However, pyrite is distinct from gold in several ways. It is harder and more brittle, typically forming in cubic or octahedral crystals, whereas gold is softer, malleable, and usually found in nuggets or flakes. Additionally, when scratched on unglazed porcelain, pyrite leaves a greenish-black streak, while gold leaves a golden-yellow streak.

In Canada, pyrite is commonly found in various geological settings, including sedimentary rocks and hydrothermal veins. While pyrite itself holds minimal economic value, it can serve as an indicator mineral for locating valuable metal deposits, such as gold and copper. Understanding the differences between pyrite and gold is crucial for prospectors to accurately identify and assess potential mining sites.