Geology Puzzle Solution, By Tony N.

gneiss Used to be granite, now is this
calcite A crystalized rock
hemite A reddish colored rock
talc A soft mineral, sometimes used for baby powder
obsidian A rock sometimes used for spearheads
quartz An igneous rock
basalt This rock is very common
limestone Some people use this for their garden
graphite You use this in your pencils
core This is in the middle of the Earth
pumice Looks like obsidian
marble This was used in Greek construction
kaolinite A fine white clay used in making porcelain

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