Chemistry, 22.09.2019 05:20 alyshaaa36

What mineral is this. nearly rectangular in shape and approximately 5 cm by 7 cm in size. blackish in color with a shiny but nonmetallic luster. peels off in very thin, flexible sheets and crumbles rather easily.

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What mineral is this. nearly rectangular in shape and approximately 5 cm by 7 cm in size. blackish i...