2/$10 Coloured Gemstone Rings

These were gifted to me so I’m uncertain of the sizes. I’m a size 5-6 and it’s quite loose, so I’m thinking they’re a size 7-8 perhaps? 🤷🏻‍♀️ Don’t think they’re real silver either bc I don’t see the hallmark…so I’m assuming they’re costume jewelry maybe?🤔 Unfortunately I can not offer any discounts including shipping bc I don’t make enough earnings back to cover it