We are a couple of rookie rock hounds on the North shore of Lake Superior. Recently we found this interesting mineral rock that is a Zeolite Agate. We decided to break it open to see what's inside.
Looks like thomsonite. Also I wouldn't pound rock on a concrete/cement floor it can damage the floor. I like to lay the rock on another large hard rock to break them open. That is very hard rock to. I think a slab saw or trim saw would work best to cut that out. I have tried with dremel and it can work with smaller thomsonite but is still hard to do. Then clean up with cab machine. Softer rock works better as you can often just wack the rock with mini sledge and nodules can fall out. With hard rock cutting out is best option.
You may have had this figured out by the end of the video, I'm not sure because I lost my audio about half way through, but what you're showing at about 19:19 is actually a zeolite named Thompsonite, its often confused with Agate, but no where near the hardness of Agate. I was also wondering if this is the same rock that you and your partner left on the beach in another video when you both had to snowshoe in? Nice videos to, by the way.
