15th Anniversary Crystal Gifts. Crystal is the first expensive gift and is used to celebrate the 15th anniversary. The price of crystal represents the sacrifice and investment you have made to the marriage over the past 15 years. Crystal also symbolises clarity and transparency as you now know each other better than your partner know themselves. Celebrating your fifteenth anniversary is a special time, it should be full of love, a time to get a little romantic not panicking over last minute gift ideas. Let MyGiftGenie help out with our range of 15th anniversary gifts that will last as long as the memories that inspired them and to ensure that you never forget any of your future anniversaries, why not sign up to our free anniversary reminder service?