Linked from
The 21 pages that link to Specific gravity, each with the reason it gives.
BuoyancyRelated: Comparing densities predicts whether an object floats or sinks.
DensityRelated: It compares densities without assigning units to the result.
Marine aquariumRelated: Aquarists use it to estimate seawater salinity.
Henry CavendishRelated: His density comparisons helped quantify gases and Earth’s mean density.
AnhydriteRelated: Anhydrite is denser than gypsum, providing a useful identification clue.
Ore dressingRelated: Density contrasts provide the physical basis for gravity concentration.
BaryteRelated: Baryte’s unusually high specific gravity is a defining field-identification clue.