A really nice concise explanation of a complex topic. One that most hobbies are just barely getting around to using.
The first time I saw the handheld unit was on the Kenos show where they found a bowl in someones house and the handheld spectrograph comfirmed that it was a very old Chinese metal bowl and worth a lot. I've wanted one since then, but they're a "bit" expensive.
Steve B
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