Popcorn Rock

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Sep 24, 2013 20:42
My sons bought a ”Popcorn Rock” at a souvenir shop in Yellowstone about one month ago.
They put the popcorn rock, which looked a normal stone, in the glass filled with vinegar and left it for three weeks as the attached instructions.
Any change didn’t happen to the stone foe three weeks.
After four weeks, when my sons started wondering if they were doing in a wrong way, the white substance like snow sprouted from the stone and the they were getting big rapidly like a plant.
It’s beautiful. It’s magical.
We think the rock should have more romantic name instead of Popcorn Rock.
We want to know what chemical reaction happened to the stone.