Yes, we brought jewellery and watches etc. in as part of our 'goods accompanying' declaration.
You will need to list and describe the items of jewellery as well as provide an estimated value for each item in Canadian dollars. You then supply this list as part of your other declared 'goods accompanying'. You do NOT need to complete a specific CBSA form, you give them the list and they fill out the form for you to sign.
See here:
https://britishexpats.com/wiki/Goods_Accompanying-Canada
We made sure we had photos of each item of jewellery AND a written valuation for each item (others have said this is not required). CBSA didn't even look at photos or valuations, they simply took our list, attached it to one of their forms, got us to sign the form, stamped pretty much every page and handed it to us to keep as proof if asked.
You MUST declare your 'goods accompanying' and 'goods to follow' at the first Canadian airport of landing when flying in from abroad when you 'land as settler' (which may or may not be at the same time you also 'land to declare PR' depending on whether or not you are doing a 'soft landing' first). You have that one and only chance to do this.