Question

If someone asked you to pay them for $1000 an ounce of "gold", how could you prove that the mineral presented was actually gold and not pyrite (fool's gold)?

Answer 1

To prove if a mineral is gold or pyrite, you can use methods such as observing color and luster, measuring density, testing malleability and ductility, and performing chemical tests.

Step-by-step explanation:

To prove that the mineral presented is actually gold and not pyrite (fool's gold), you can use several methods:

1. Color and luster: Gold has a distinct yellow color and a shiny, metallic luster, while pyrite has a brassy, pale yellow color and a more dull luster.
2. Density: Gold is much denser than pyrite. You can compare the density of the sample to the known density of gold (19.3 g/cm³) using a balance and water displacement method.
3. Malleability and ductility: Gold is very malleable and can be hammered into thin sheets without breaking. Pyrite, on the other hand, is brittle and will break when hammered.
4. Chemical tests: You can perform specific chemical tests, such as the acid test, to determine if the mineral is gold. Gold is resistant to most acids, while pyrite will react and dissolve in certain acids.

By using these methods, you can confidently determine whether the mineral presented is gold or pyrite.