I sent mum with two necklaces I found in an op-shop a few months ago- $8 each- I bought them because they were just so gorgeous. From what I could find- Murrle Bennett might be responsible for them, they were made ~1910 - 1920. There are many similar ones online for a buttload of money. Anyway I sent her with them to an antiques festival.
She just called me and said the appraiser said they were the most interesting thing he’d seen through the whole show- and valued them at a minimum $150 each. Only one has the original chain though- so that might be even more.
Seriously I’ve been back to that store a few times- they know nothing of jewellery there I’ve seen pearls and gold chains thrown into the costume jewellery rack its awesome