Hello. I bought a gold ring at the ORO jewelry store. In the process of wearing, I realized that there were not high-quality impurities in the ring, possibly copper, since a chemical reaction started in contact with the finger: the finger turns black. I came to the seller with a request to return the product and refund the money. To which I received a categorical negative response. Photos of receipts and photos of the hand are attached. And you decide for yourself whether you need copper for the price of gold...