YES. i use it in Banana Tree Pots
yes, it's not powdery. my son has asthma nad the the other sand, the cheaper stuff, is more powdery. This stuff is more like kosher salt in consistency, and has much less powder sand, thus less coughing. Almost none in my son's case.
Natural. Just like the beach sand.
ALL Sand(s) contain silica !!!
Each location buys bulk aggregates from local quarries.