Silver and Gold

Specific Gravity (SG) is the ratio of the density of a given substance, to the density of water (H2O). Substances with a specific gravity greater than 1 are heavier than water, and those with a specific gravity of less than 1 are lighter than water.

Gold has a specific gravity of 19.3, meaning it is 19.3 times heavier than an equal volume of water.

Silver's specific gravity is 10.5.