Does the heft test work for mounted stones?

• A. Yes, for mounted stones
• B. Yes, but only for mounted
• C. Only for loose stones
• D. It doesn't work with mounted stones

Answer: (C)

The heft test gauges a gem’s relative weight for its apparent size, helping you sense whether a stone’s density matches expected values. When a stone is loose, you can compare its heft directly to what you know about genuine diamonds or common simulants, making the test quick and practical. But with a mounted stone, the setting adds metal weight and changes how you perceive the stone’s heft; you can’t isolate the gem’s feel or compare it accurately because the surrounding metal and grip mask the true weight of the stone itself. Because the test relies on assessing the stone’s individual heft, it only works for loose stones.