Well...
My nose is not a big fan of Silmar now...lets put it that way. The blank was good, there are about 3 bubbles still in the casting in areas right next to cactus, so they will mostly go unnoticed. There were a few bubbles that were exposed on the surface after turning which filled in fine with CA glue. I used a CA finish by the way, if that isn't obvious. All in all it turned and finished fine.
I like the way the cactus is laid into the casting though - all veins no flats. I still have another half to turn which will probably end up being a metallic blue.
I'm not sure what Ron's process is for casting these, if he is using a pressure pot or not - but they seem to be good little blanks. If I get some additional interest from customers, I'll surely purchase more.