Agate should be slightly translucent in my opinion. Nevada Wonderstone is a type of rhyolite that can have a lot of colors and banding. In the absence of certainty of a find location I am just guessing about what the material
might be.
I agree some better pictures would help, but it looks man made with a drilled hole. No clue if it’s ancient, hippy work from the 60’s, or a modern piece. It’s interesting and I appreciated seeing it.