The natural moonlight stone of the princess and the knight’s necklace, also known as the stone of the lover , has the meaning of making love long , sweet and honey . When you turning the stone under the effect of the moonlight , you will see the halo of the precious stone changing from white to blue , like the hazy moonlight . A natural moonstone , which is natural and blue , is only used for the size of the necklace , the price is close to 30 dollars .