Final answer:
Iron sulfide, often called pyrite or 'fool's gold,' looks like gold but is almost valueless. It is chosen for its aesthetic resemblance, not for economic value.
Step-by-step explanation:
Iron sulfide, which is a compound formed from iron and sulfur, resembles gold in color but is almost valueless compared to gold. So, the correct answer to what does iron sulfide look like, and what is its value, would be B) Resembles gold, almost valueless. Although it may be mistaken for gold due to its shiny, metallic luster and yellowish-bronze color, it has minimal economic value. Iron sulfide, more commonly referred to as pyrite or 'fool's gold,' can indeed trick an untrained eye into thinking it is the precious metal. However, pyrite is not nearly as valuable as real gold and is abundant in the earth's crust, which further decreases its value.