When a rock becomes
What it once was kind of
This rock was in the backyard when we moved in. Thought it looked interesting so I brought it in, been using it as a paper weigh for years. As with anything I picked it up, I lost my grip when it hit the floor it broke, it's still a paper weight and fun when people try to pick it up and it falls apart.
Did look up what kind of rock it was. It's from a class of sedimentary rock's. A conglomerate is a clastic sedimentary rock that contains rounded clasts. The space between the clasts is generally filled with smaller particles and/or a the matrix that binds the large clasts together can be a mixture of sand, mud and chemical cement. chemical cement that binds the rock together.
As the chemical cement dries out it breaks down so the rock falls apart.