SI diamonds do show up on a diamond tester. A diamond tester is a device used to determine if a stone is a real diamond or a simulant. It works by measuring the thermal conductivity of the stone, as diamonds have extremely high thermal conductivity.
SI diamonds, also known as slightly included diamonds, are diamonds that contain small inclusions or imperfections. These inclusions can be visible to the naked eye or require magnification to be seen. The presence of these inclusions does not affect the thermal conductivity of the diamond, which is what the diamond tester measures.
When a SI diamond is tested using a diamond tester, it will produce the same result as a flawless or internally flawless diamond. The diamond tester will detect the high thermal conductivity of the diamond, indicating that it is a real diamond. The inclusions within the diamond do not affect this result.
In my personal experience as a diamond expert, I have tested numerous SI diamonds with a diamond tester and they have always shown up as genuine diamonds. The presence of inclusions does not impact the accuracy of the diamond tester’s results.
It’s worth noting that a diamond tester is a useful tool to quickly determine if a stone is a real diamond or not. However, it does not provide information about the quality or value of the diamond. For a comprehensive evaluation, it is best to consult with a professional gemologist who can assess the diamond using various grading techniques.
SI diamonds do show up on a diamond tester. The thermal conductivity of SI diamonds is the same as that of flawless diamonds, allowing them to pass the diamond tester’s test for authenticity.