Hello all! I found this rock years ago at a river here in the Philippines, but up until now, I have no idea what it's called. I have searched the net just recently, and the closest I found was "rounded white prehnite." Can anyone please verify this? It doesn't seem right. Thank you for your time!
Thanks for the reply! I'm getting closer to identifying it with "botryoidal chalcedony." As for it being less brilliant white, I've really no idea. I'm far from being an expert on rocks and minerals, let alone geology