Each Standard Home owners insurance policies are different, so best to talk to you agent, but don't count on 100% replacement cost on items if lost in a fire, stolen, etc.
The best "Collectors" insurance are :
American Collectors Insurance Company
or Collectible INsurance company,
they offer ALL Risk coverage that you can't get through your homoewners... I have American Collectors for my stuff and they offer a blanket type of coverage, only want itemization for items over 1500.00
I have photos and logs of value as well in case of a loss I have proof of what I had.
example premium is around 275 for 50K of coverage.
Good luck!
I also Sell Insurance and Johns Right American Collectors is a great company to use ,I use them for my stuff their great people to work with .