So I'm also wondering about the durability of the bowling ball mosaics. My mom has received a number of garden mosaic stepping stones over the years. She never walked on them but left them out as art. It never took more than 3-4 years for pieces to fall out or for the matrix to crack. Could be a materials thing so I thought I'd ask. We get around 45 inches of rain a year and summer is HOT. Not Arizona hot but still too hot for me!
