In a blog titled "Can You Spot The Difference," Tatty Devine, famed for its unique handmade designs, showed photos of its own necklaces side-by-side with identical models sold by Claire's.
"No, that’s not your eyes going funny," they wrote, adding that, "this isn’t the first time we’ve noticed this kind of thing at high street retailer Claire’s."
The story was immediately picked up by the brand's followers on Twitter, who weren't shy in expressing their disgust over the alleged duplication.
"Urgh shame on Claire's Accessories for blatantly ripping off Tatty Devine stuff," one user wrote.
"Outrageous! claire's accessories copying tatty devine jewellery design 1:1 and not even responding to critics! bad PR!" another added.
Tatty Devine designers Rosie Wolfenden and Harriet Vine (pictured above) told Stylist: "We're really proud of what we've created with Tatty Devine, and a big part of that is our original designs. We design every piece, and it's all made in Britain by our own skilled team.
"It's flattering when people like something you've created, but this kind of thing can't be tolerated. The reaction from our customers has been amazing. It's gone viral on Facebook and Twitter overnight."
Hind Hadj, Head of European Marketing & PR for Claire's, said in a statement, "Claire’s is aware of the blog post yesterday on the tattydevine.com blog and is currently investigating these comments."
Only one of the necklaces accused of being a copy of Tatty Devine's designs is currently viewable on Claire's website.