This Light-Box Offers both Long wave and short wave ultra violet light. Ultraviolet light tests are important for separating and identifying-gemstones. It is particularly useful in separating-many synthetics, doublets and triplets from natural-gemstones. This particular unit has a reflection free viewing area with protective glass to block the UV short waves from-damaging your eyes. It also has a indicator inside that allows you to be certain which light (long or short) you are using. A-classic
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