Calculate the volume of an irregular gold object using water displacement. Enter the starting and final water readings to obtain displaced volume, then optionally enter the object's mass to calculate measured density and specific gravity.
Useful for irregular jewellery and solid objects.
The density and specific-gravity fields appear when object mass is supplied.
Because 1 mL is equivalent to 1 cm³, millilitre water readings can be used directly for volume in cubic centimetres in this calculation.
Rings, chains, pendants and other jewellery can have irregular shapes that are difficult to measure accurately using a ruler. Water displacement provides a direct volume estimate when the item can be safely and completely submerged.
Read the liquid level consistently, avoid trapped air bubbles, ensure the object is fully submerged and avoid letting the object touch the container during the measurement. Small volume errors can have a large effect on density when the object is small.
Once the displaced volume is known, adding the object's measured mass allows you to calculate density. That density can then be compared with reference values for gold alloys.
Water displacement does not identify the material by itself. Hollow pieces, stones, trapped air and attached non-gold parts can produce misleading results.
The increase in water level equals the displaced volume when the object is fully submerged.
Yes. It is particularly useful when geometry is difficult to measure directly.
Trapped bubbles can increase apparent volume and should be avoided.
Yes. Divide measured mass by displaced volume.
No. It supports a density screening test but is not conclusive authentication.