By: Avery Allen

This rock was located on the side of my house on a pipe.

After putting on the vinegar the rock stayed the same, which means there is no calcite.

This rock was located on the side of my driveway.

After putting on the vinegar, I realized that the rock got darker than before

I found this rock at the bottom of a tree trunk in my front yard.

After putting on the vinegar, the rock had a couple of grey and white lines on the front.

I found this rock under bushes and trees in my backyard.

After dropping the vinegar on the rock, I saw little bumps that weren't there before.

I found this rock in my backyard under a big tree by my grill.

After putting the vinegar on the rock, It looked the same as it did before.