Are you planning to buy a diamond but unsure how to verify its authenticity? Determining whether a diamond is genuine requires careful observation and, in many cases, specialized tools. Below, we outline four key methods to preliminarily assess a diamond’s authenticity from the comfort of your home. However, for a conclusive evaluation, consulting a professional gemologist at Gold Bank is always recommended.

1. The Scratch Test

A real diamond is one of the hardest materials on Earth, capable of resisting scratches on glass. While the scratch test can provide some insight, it’s not foolproof and should be performed cautiously. Test only on an inconspicuous area to avoid potential damage to the stone.

2. Light Performance

One hallmark of a genuine diamond is its brilliant sparkle and the “fire” it emits—light refracted into a stunning spectrum of colors. Observe how the stone behaves under different lighting conditions. A diamond with muted or no fire could be a simulant, suggesting further examination is needed.

3. The Density Test

Real diamonds, due to their high density, sink quickly when placed in a glass of water. Simulants, on the other hand, may float or sink more slowly. While this is a useful indicator, it’s not always conclusive and should be paired with other methods.

4. Professional Expertise

For the most reliable evaluation, turn to a qualified gemologist. With access to specialized tools like diamond testers that measure electrical conductivity, they can provide a definitive verdict on your diamond’s authenticity.

Final Thoughts

These tips are designed to help you make an initial assessment of a diamond’s authenticity. However, they are not substitutes for professional evaluation. For complete peace of mind and an accurate determination, always seek the expertise of professional gemologists at Gold Bank.