Sterling Silver Lemon Quartz Ring (0.70 CT) 30 Day Easy Returns. Jewelry Gift Box Included .925 Sterling Silver Quartz stones are heat treated to give this light Yellowish orange color. This process is safe and permanent. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!