Learn the complete workflow for a gold density test: weighing, measuring volume, calculating density, comparing reference values and spotting the practical errors that can make a result misleading.
Calculate density from mass and volume.
For an irregular solid, water displacement can provide its volume from the change in water level. The object must be fully submerged and free of significant trapped air. Read the level consistently because small volume errors can create large density errors for small objects.
Karat tells you the proportion of gold by mass, but it does not uniquely define the remaining metals. Two pieces marked 18K can therefore have different densities.
These alloy figures are approximate rather than universal constants.
Density can be useful for screening, but it should not be used alone to certify a valuable item. Plating, hollow construction, stones and other non-gold components can change the effective density.
Measure mass and volume and divide mass by volume.
Approximately 19.32 g/cm³.
Yes, particularly for irregular solid pieces.
No. It is a screening method.
Because their non-gold alloy compositions may differ.