One of our summer projects is to find all the good rockhounding sites within an hour or so drive. An obscure website listed the Potlatch River canyon near Kendrick as a place to find petrified/opalized wood, so the kids and the dog and I drove a few minutes out of Kendrick and found a good gravel bed to hunt. No opalized wood, but lots of these pretty rocks — Agates or quartz maybe? A few pink ones that might have some carnelian involved. Needless to say, we’re still fine tuning our rock identification skills.