Yoursfs is just selling fashion jewelry.The value is not expensive but fashion .The fashion jewelry looks like fine jewelry.so they are very popular in the contemporary.However, the material is just the base metal/alloy with three times of 18k gold plated,the jewelry will not maintain longer than the fine jewelry in your daily wearing.please see below for some case and tips:

Why do ring TURN YOUR FINGER GREEN?
1. When a ring Turns Your Finger Green it's either because of a chemical reaction between acids in your skin and the metal of the ring or a reaction between another substance on your hand, such as a lotion, and the metal of the ring. 
2. The 18k gold plated ring has Other Metal Materials. Due to the corrosion resistance of these materials is not good, a long time with aging will definitely produce discoloration. 
3. BODY'S SWEAT will erode the metal to be faded too, please off it when you are in sports or in hot day.

How can fashion jewelry KEEP THE ORIGINAL COLOUR is a bit longer?some warm tips :
1.Please avoid contacting with the acid and alkali, corrosive substances.
2.Please avoid the collision, so as to avoid surface scratches.
3. You can avoid contact with Perfume, Body Lotion, Hairspray or any other Chemical that May Harm the shine of the metal. 
4:Please avoid wearing it when sweating a lot, shower or sleep, etc.
5.Sometimes you can Wear Different Rings not just one all along, every day off with cotton soft cloth to wipe surface clean, put into box is better.

6. Some people apply a polymer coating to their rings to act as a barrier between their skin and the metal of the ring. Nail Polish Is One Option.
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.We strive to offer you the best value and service possible. Please feel free to contact us.

• High quality Austrian crystal sparkles with grace and beauty.
• Three layers of 18K white gold plated, nickel free and tarnish free, silver color.
• A perfect accessory to your outfit or as an appropriate gift used in wedding and engagement party or other occasions. It brings an elegant and graceful look to any special occasion.
• Shipped out in an exquisite jewelry gift box. If not fulfilled by Amazon, delivery time 7-15 days.
• One year warranty to ensure you a perfect shopping experience.

High quality Austrian crystal sparkles with grace and beauty.Italina