What indicates that a cubic centimeter of quartz olivine and gold weighs 2.5 3.0 and 19.8 grams respectively?

The weights of a cubic centimeter of quartz, olivine, and gold indicate their respective densities, which are calculated by dividing mass by volume. Quartz has a density of about 2.5 grams per cubic centimeter, olivine around 3.0 grams, and gold significantly higher at approximately 19.8 grams. This difference in density reflects the atomic and molecular structure of each mineral, with gold being much denser due to its heavier Atomic Mass compared to the silicate minerals. Such measurements are essential in mineralogy and geology for identification and classification.