Rock 85 ~ Wafer Monument Rock ~ October 15, 2105 ~ Ontario CA

I found this incredible wafer thin tall rock in an antique store in Ontario today. I wasn't even looking. It is a gray and white and sparkly speckled composite, and someone has flattened and polished one edge so it stands up.
Stands approximately 3 1/4" tall and is approximately 1/2" thick at the thickest.