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Yeah. 

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This is a piece of basalt that was taken 
off the ocean floor in the Gulf of Alaska. 

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These dots are all crystals, and these crystals look a 
little old and rotten, but these look fresher and cleaner. 

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So now we are going to make a couple more cuts, and 
turn this into a rectangle. 

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You can see that it is reasonably thin right now.