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Determining gemstone

I\’m Laura. I\’m retired Air Force and have always been interested in gemstones but recently started learning more about them.
Right now, I\’d like to know how to determine the difference between white topaz and white zircon.
Thanks.

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Your best and most economical way is to do an SG test if you go to youtube there are some very good videos to show how to do it. The other way is to do a RI but that entails buying a small machine, though they are reasonably priced.

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