Explanation:

- Option 1: Fluorite

- Fluorite is known for its vibrant colors, including purple, blue, green, and yellow.

- It is used in the manufacturing of certain lenses and in the process of smelting.

- Option 2: Pyrite

- Also known as "fool's gold" due to its metallic luster and pale brass-yellow hue, similar to gold.

- It's often mistaken for gold by inexperienced prospectors.

- Option 3: Magnetite

- Magnetite is a magnetic mineral, often used in compasses.

- It is not visually similar to gold.

- Option 4: Quartz

- Quartz is a common mineral, usually clear or white, and used in making glass.

- It doesn't resemble gold in appearance.