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| "Scoria has holes! It looks like a lava rock." |
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| "When you rub two of the rocks together they make rock dust!" |
"When the rocks are put in water they change color and the water gets dirty!"
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| "There are bubbles coming from the rocks!" |
|
| "Scoria has holes! It looks like a lava rock." |
|
| "When you rub two of the rocks together they make rock dust!" |
|
| "There are bubbles coming from the rocks!" |
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