Amethyst ID is very dicey…I don’t know of any locality specific inclusions which would identify amethyst from Siberia vs “Siberian” color amethyst from other places. Moreover, separating synthetic amethyst from natural is also very difficult… It can be done by sophisticated lab tests, but the cost of the tests is greater than the value of the [possibly] natural amethyst. So if you see inclusions in a stone that are obviously synthetic, you have synthetic amethyst. If you see obvious natural inclusions, you have natural. If the amethyst is clean, you have no conclusive way of knowing whether it is natural or synethetic. Fortunately amethyst is a pretty, but inexpensive stone, so it seldom matters a lot whether it is natural or not. -royjohn
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