Shiny rock things

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    I fucking love lab grown bismuth crystals.


    The first two are crystals of elemental bismuth (the active ingredient in Pepto Bismol). The third looks like cinnabar, a compound of mercury and sulfur.


    I was gonna say could the first 2 be titanium, it does get coloration like that, but idk


    Ti crystals apparently are iridescent like that, but they have a more ordinary shape when they crystallize (like the shape of quartz crystals). Bi crystals are the only ones with this distinct shape, IIRC.