Keep the packaging and products new. Two conditions that you cannot refund are listed as follow: (1)Product is used or damaged (2)Package or drop of product is damaged. [About color difference and measurement] (1)Because of the difference of camera or light, the color may look a little bit different from the picture. (2)It has a little difference due to manual measurement. [Recommendation] The same piece of jewelry should be avoided for a long time, especially in hot summer, the jewelry plating will be easily eroded by prolonged contact with sweat, so it is best to replace it often. [THE WAY TO MAINTENANCE] 1.Avoid Chemicals. Please take it away from cleaning agents, perfumes, body moisturizer and so on, they can take off the finish and change color 2.Please Don't Wear It When Sleeping. To keep your gorgeous jewelry looking like new, take it off at the end of the day and give it a quick wipe down with a microfiber cloth.