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Rocks are mainly salts and have a pH of circa 7. Limestone and dolomite are more basic and have a pH of > 7 but <9.

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βˆ™ 12y ago
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βˆ™ 5mo ago

Limestone and marble are rocks that have a pH on the alkaline side of the pH scale (above 7). On the other hand, granite and sandstone are rocks that typically have a neutral to slightly acidic pH.

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Q: What rocks have a pH on the pH scale?
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