Topaz is treated by electron gun radiation with power of 10 MeV. This kind of electron radiation treatment can also be found in food preservation processes. It is not nuclear radiation treatment and stone is absolutely safe to use. All blue topaz are treated and there is no untreated blue topaz and all professional sellers disclose this treatment. To save on shipping, you can combine items up to 15 days. We only charge one time shipping. Smallest Inclusions with free Eye very very difficult recognizable / Very small inclusion(s), very difficult to see by eye Very small inclusions, difficult to see with the naked eye / Some inclusion(s), difficult to see by eye Small Inclusions with free Eye recognizable / Inclusions are readily visible but brilliance of stone is not effected Included, visi.
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