Having had all my jewelery stolen last year when I was burgled, this is a subject close to my heart...
I had my old engagement ring listed separately, but all the other jewelery was just under 'valuables' in the policy.
Now, 'valuables' includes not only those things you'd THINK it did, like jewelery and art (other than that which is specified on the policy), but things you may not have thought of, like anything 'battery run', including the laptop, some stereo, cameras etc...
The most important thing I learned is that you have NO idea how much your jewelery is worth until you have it valued. I had a huge amount of jewelery, much more than I was insured for, but I'd have never guessed I had that much. The vast majority of mine was gifts and family hand-downs, and I'd never thought of it as valuable.
Thus, I was paid out for the item individually insured, and the pool of stuff, but no more than a certain amount per item. I had previously had the wedding ring listed separately too, but, the broker had advised me it'd be covered 'under the pool' as it's value was less than the maximum single item value allowed in the policy.
To insure a particular ring, best thing is to ring your broker and let them know what the valuation is. Just be aware, if they advise you that it'd be covered 'under the pool' that you need to think about what else you have that would fall into that category. No point having 15 items, each worth $1000, and thinking they'll all be covered under a $10,000 pool. They won't.
asy