I totally agree. Wouldn't have said this when I was younger, but these days I wear my jewelry to enjoy it and don't much care if it gets stolen. It's just stuff. And there are far more important things to insure against: like city sewer backup to protect basement appliances from our town's dysfunctional street engineering.
Amica does. Just got my new homeowner's policy update with inserts bragging of "enhanced jewelry coverage." But I don't know what they'll let you ensure beyond the basic $1500.
Another thing about insurance companies...they have specific definitions of what "replacement cost" is. For instance my mother's house was burgled and among the jewelry taken were solid gold bangles. The insurance company claimed that "replacement cost" covered "typical current manufacturing" so they would only pay for her to replace them with lightweight hollow bracelets. They had her sit down with a jeweler to inventory the stolen jewelry and determine the then-current manufacturing replacement values. I told her, "But ma, maybe you can't buy solid-gold bangles at mall jewelry stores but you can still buy them at Neiman-Marcus!" But she didn't care to fight it.