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Refractometers Provide Identification For Less
For my purposes, these refractometers serve very well. I'm more of a hobbyist, so this light, portable model is just fine by me. It still provides a very clear, high magnification image of whatever stone I want to look at, especially when I use the contact fluid. I love that it has a built-in light source, so I can use it in any environment. This provides very reliable identification and authentication for jewelers and geologists.