A diamond tester can indeed tell the difference between lab-grown and natural diamonds.
Diamond testers use thermal conductivity to determine if a stone is a diamond or not.
Both lab-grown diamonds and natural diamonds are excellent conductors of heat.
Diamond simulants like cubic zirconia and moissanite are not good conductors of heat.
Therefore, a diamond tester will recognize that lab-grown diamonds share the same thermal levels as natural diamonds and identify them as genuine diamonds.
5 Key Points to Know
1. Thermal Conductivity
Lab-grown diamonds and natural diamonds both have high thermal conductivity.
This makes them indistinguishable from each other using thermal conductivity tests.
2. Surface Imperfections
Lab-grown diamonds tend to have fewer surface imperfections compared to simulants.
This is because they are grown in a controlled environment, resulting in higher clarity and fewer flaws.
3. Accuracy of Testers
Not all diamond testers are created equal.
Some may be more accurate with certain simulants than others.
For example, some testers may be better equipped to handle moissanite than cubic zirconia.
4. Additional Distinctions
Lab-grown diamonds can be controlled to have high clarity and can even be flawless.
They also tend to have a beautiful color (D-E-F) or appear more transparent.
If a diamond is significantly less expensive than a natural diamond (around 60-70% less), it is likely not a natural diamond.
5. Certification and Origin
Checking the diamond's origin and certification through reputable bodies like the GIA or IGI can provide clear details and information about whether it is a natural or lab-grown diamond.
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