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The difference between black opal and crystal opal

How is it that opals from the same place can be so different? In today’s video, I explain the difference between black opal and crystal opal and how you can spot them! Crystal opal A great way to check whether an opal is a crystal opal or not is with a torch (or flashlight for my American opal-holics.) Shine the light from the torch through the back of the opal; if the opal glows, you’ve got crystal opal! Crystal opals can have a tint but are always semi-transparent, meaning you can see the torch’s light through them. Black opal The same test can be done to see whether what you’ve…

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