Depends on the insurer, but you will DEFINITELY need an extra policy to cover them.

The name for it varies, but it's generally along the lines of 'personal valuables', and covers special items like sporting gear, expensive jewellery pieces that go above the standard amount, etc.

From there, there's a few different methods and options, ie some will only list individually, others let you give an overall estimate.

It's vitally important that you take photographs of EVERYTHING you want insured. These photos must be dated, and keep them somewhere where, if the worst case were to happen, you'd still have copies of those photos.

You will probably have a little bit of difficulty in getting them to grasp what you're after. When I got mine years ago, nobody knew how to process it, considering it was collectibles that weren't sport related. It was kinda funny, and it did mean I'd get calls out of the blue from the insurance guys asking me if I knew anything about *insert pop culture collectible here* and what would I estimate them at. I was their go-to-geek (I was working for the bank, btw, not just a random guy off the street).

And if you list a total, triple check it. Seriously. We ALWAYS undervalue for insurance, and well, you want it to realistically cover everything. Don't be stingy, it'll only come back to haunt you should the worst happen.