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Well, it actually contains tungsten bits with 2% thorium dioxide. You can add some 30% H2O2 to them and let that sit for 2 weeks so that all the tungsten dissolves, then you can get your ThO2 out and reduce it with magnesium or whatever. You can look up piano and science guy's video on how to extract them (he says it's pure thorium but it's actually not; it's 2% ThO2, I told you how to purify it). BTW he has a very good channel on element collecting.Channel: https://www.youtube.com/channel/UCO9GMFAPis4oCML11...Thorium video: