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  • ...l=Northern Mettle 2017|The rich purple color of this amethyst is caused by iron impurities in common quartz.}}{{
    2 KB (232 words) - 16:20, 20 March 2018
  • ...warded from Ocean Wars 2016|This special volcanic agate was formed as hot, iron-and-silica-saturated water filled in cracks in existing rock long long ago.
    2 KB (252 words) - 20:00, 11 February 2018
  • ...indeed! This is a slice of meteorite consisting of olivine crystals in an iron matrix, polished until it sparkles.}}{{
    3 KB (403 words) - 18:41, 22 March 2018