Diamond UV Fluorescence Tester

Diamond UV Fluorescence Tester:

To properly use a UV keyring, take the following steps:

• Never look directly into the light
• Turn off surrounding lights so you are in a dark environment.
• Place the gemstone table-down if facetted. If table up, the gemstone may reflect the UV light into your eyes and creating confusing, conflicting or inconclusive results.
• Hold the keyring approximately two inches away from the stone and, if testing multiple gems, always be consistent with the distance at which you hold the light.
• Record whether the stone is inert or fluorescing, and the strength of the reaction.

Sometimes you may see some dull purple or red light in the gemstone or on a few facet edges. This means that the gemstone is reflecting the purple UV light and is not itself a fluorescent reaction.

This LED UV source has the exact wavelength UV light that detects fluorescence where others miss, even off color diamonds. A blue fluorescense, may be a positive factor since the diamond will look whiter. Yellow is usually a negative indication. The strength of the fluorescence is a secondary factor ranging from None, Faint, Medium, Strong, Very strong.

We sell a great selection of diamond grading equipment, such as tweezers, diamond sorting pads, testers , UV lights, sieves sets and more!