re: Now Closed: I'll answer any question you have about ROCKS!

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What makes dolomite harder than granite? (Heard on History channel the Egyptians used dolomite to chip granite.)

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I didn't hear that. I thought the Egyptians only worked on limestone blocks they quarried.

Either way sometimes granite can be chipped away at if it has been weathered for some time. Water can infiltrate between crystals and act as a weakening forced between the crystals. With that, simple tools could be used to scrape the granite and shape it in the way it needed shaping.