That's called "good neighbor fencing." All the builders in Houston do this now. Not really any gap because of the posts.
Kim, I didn't specify the mother of pearl. I think it's actually part of the Indigo Blue color. Mentions shells in the description. They put it on by "throwing" it at the plaster about half way through the process. I'm sure had I told my builder I wanted to add it he'd have gladly charged me $400 and not told me it was part of the color already.![]()