Those look great! As a Heathen myself, I can say they look pretty spot on, but I don't really use the Anglo Saxon FUTHORC so I don't have much more input on those. Most of the stuff I've seen on using Runes for divination and such use the Elder FUTHARK, which is a similar but older set of runes. Many of them are the same, some of the runes are similar, and some aren't shared between the two.
I would prefer to use natural materials (tree branch, stones, etc.) for myself, but any material works just as well, if not better, when made with benevolent intent as a gift.