Cheers guys,
Its the shop opposite Bananas. I have no idea where it dropped out so it would need replacing, i just looked down and saw that it was missing, i'm gutted.
I wasn't sure if they were obliged to or if it was at their discression. Myself and my family have spent a fair amount of money in there between us but they got the hump the last time i was over because i went to another shop (the big one on the corner down from Car cemetery) to have a ring made.
Also, if they replaced the stone, where would be the best place to have the ring checked?. I'm just a bit worried after how they were with me last time that they'll replace it with a cubic or something..