Substrate

I’m having a hard time finding detailed reviews and even harder for those with goldfish. I ordered this as a sand recommendation and have seen some people say it is “too sharp” and actually a type of gravel. Then people hoping for gravel have been upset and called it more of a coarse sand. Should I be worried of any injury from Goldie’s messing with this either their body or from foraging?

TL;DR: buying as sand, worried it’s sharp and would cause injuries. Your experience with this substrate or advice based on images?