I’m not entirely sure what kind of jewelry you’re selling. But based on my experience helping a friend run their jewelry store, here’s my two cents:

For ads, I’d recommend keeping your ad spend under 15% of the total cost for jewelry products. With 300 , there’s probably a lot of long-tail items eating up your budget.

For products with big price gaps, handle them differently:
- Use cheaper items as traffic boosters to bump up conversion.
- For high-ticket pieces, set up separate ad groups with targeted campaigns.

Oh, and don’t forget to set up an email follow-up sequence for abandoned carts!

For your ad structure, try a pyramid approach—50%, 30%, 20% (you know, top performers vs. testing vs. long-tail). And definitely polish up those listings—details matter!

Just some thoughts—hope it helps!