Gemstone Density Calculator
Calculate specific gravity from hydrostatic weighing (weight in air and water) for gem identification.
Inputs
ct
ct
Results
Specific Gravity
3.52
Density3.52 g/cm³
Possible GemsDiamond, Topaz
Volume1.42 cm³
How to Use This Calculator
- Place the gemstone on a precision scale and record the Weight in Air in carats.
- Suspend the stone in distilled water using a thin wire and record the Weight in Water.
- Review the calculated Specific Gravity — diamond is 3.52, ruby 3.99, emerald 2.72.
- Check the list of Possible Gem Matches for stones with similar specific gravity values.
- Use the Volume in cm³ to cross-check carat weight estimates for mounted stones.
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