Yes, a diamond tester can 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, while diamond simulants like cubic zirconia and moissanite are not. Therefore, a diamond tester will be able to recognize that lab-grown diamonds share the same thermal levels as natural diamonds and identify them as genuine diamonds.
Additionally, when examining the stones under magnification, lab-grown diamonds tend to have fewer surface imperfections compared to simulants. This is because lab-grown diamonds are grown in a controlled environment, resulting in a higher clarity and fewer flaws.
It is important to note that not all diamond testers are created equal, and some may be more accurate with certain simulants than others. For example, some testers may be better equipped to handle moissanite than cubic zirconia. Therefore, it is advisable to use a reliable and reputable diamond tester to ensure accurate results.
Furthermore, there are other ways to distinguish lab-grown diamonds from natural diamonds. 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. Additionally, 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.
In summary, while lab-grown diamonds may visually appear identical to natural diamonds, a diamond tester can differentiate between the two based on their thermal conductivity. Other factors such as clarity, color, price, and certification can also help in distinguishing between lab-grown and natural diamonds.
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