I've been lo for a long pendant necklace with a semi-precious stone but can't find one I like in the UK.
I'd prefer a blueish or grey stone, probably lighter than the one below, and a gold chain (preferably gold vermeil).
I have looked at John Lewis, missoma, Mónica Vinander, Etdy and lots of others I can't remember now.
I like www.selfridges.com/GB/en/cat/kendra-scott-inez-14ct-gold-plated-and-veined-turquoise-necklace_5276-10236-N10574/?previewAttribute=Bronze%20veined%20turquo this
one but it's I'd prefer a soft colour stone and I'm not sure the gold plating would last at all.
Budget £50-100