We guarantee our products. We use genuine Swarovski crystals and only the finest components. All orders are custom, special order, final sale. All metals darken over time due to oxidation. This is normal and unavoidable. We suggest cleaning all crystal chains with a drip dry type crystal cleaner. Any problems with an order received, must be reported, in writing within 24 hours of delivery. We replace any items damaged in shipping. Most orders are sent signature required unless requested, by the customer, that the items be sent with no signature required.