I didn't know what you are selling in this listing until I read the description. Your titles and tags need to say what the product is, so definitely add pendant in there. Also, for your tags use phrases:
- silver pendant
- amethyst pendant
- star pendant
- star fish pendant etc.
https://www.etsy.com/listing/158668092/amethyst-ans-sterling-silver?ref=shop_home_activeMy SEO could use a lot of work, I use way too many repetitive phrases in the titles, which doesn't sit well with google but it brings me a lot of traffic through Etsy search.
Other than SEO, I would say you need more listings. I know it takes time to make that much stuff but I noticed the more I list, the more I sell.
I'm pretty sure someone that knows more about these things will offer their opinion soon.
Best of luck!