jewerly carding is not harder than the rest, you might think i'm wrong but i'm talking from my own experience, you just have to know what you are doing.
What I mean is; an experienced binlist, dont use bins you never used, add a correct ID & fake passport.
The only difference between jewerly and other electro/clothes shops is simple, you have to carry the amount of your desired article in cash in your wallet.
Will save your ass a lot of times, each time a transaction's going weird, the cashier get his smile back when you put the cash on the table.
The goal is not to buy your article in cash each time, thats why you have to work with strong and known stuff (bin/ids).
Let's say you have to pay your stuff in cash 1 out of 5 time, you are good to go
I would not advice new peoples to card jewerly at their beginning, i'm sure you are going to try to buy expensive (4k+) shit and get in troubles.
One more thing to know, in EU, jewerly shop are doing a scan of your ID, so make sure to not put your exact face on it, put a face which is looking like your.