Comment by osiris on January 22, 2012 at 8:54am

phelps.. is it cement on rebars? it looks strange to me!

Comment by Jeff Tobler on January 22, 2012 at 12:01pm

Made molds of basalt columns for a large commercial job. They were used on a water feature we installed over a parking garage, to reduce the overall weight. Afterwards, I had all the basalt molds, so I really pushed the use of them to the customers. A naturally occurring type of rock formation in the pacific northwest. Here's another use of them.

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