https://www.etsy.com/listing/111591806/heart-pendant-glass-jewelry-necklace?ref=shop_home_active_23 you have "pendent" in a tag. its fine to misspell a word, but not in this case.
you are relevant for:
heart pendant
glass jewelry
necklace
lampwork
boro
sparkling blue.
there is much more meat on the bone.
hand blown, and handblown are different search results, so to be in both, you have to use both in title, and in one tag. I would use one form in one listing, then the other form in other listings, since you have so many.
Teal Heart Pendant, Lampwork Jewelry,Handblown Boro Glass, Blue Heart Necklace, Hand blown glass art, Blue Lampwork Pendant, Blue lampwork heart
thats the title, and 8 tags. For the other tags, use nonconsecutive title words.
so, do that and you are relevant for one 4 word phrase 9 three word phrases,18 two word phrases and 24ish one worders
make sense??