I ordered this necklace believing that the moonstone was a natural gemstone. I went to Starfish Project website and it is described there as a "moonstone crystal". This means that it is a lab created crystal stone, not a natural gemstone. When held to the light I can see two tiny bubbles (which occur during manufacturing) and there are no inclusions (which are found in natural moonstone). Another test is the temperature of the stone (it is not as cold as a genuine moonstone). I was really disappointed, and may return the item. All that being said, it is a lovely design, size and appearance. The one time I wore this necklace I received many comments and compliments. Now that I am over my initial disappointment, I may keep it. Just know that it is not a natural gemstone, but is a "genuine moonstone crystal" which is a nice way of saying "not a natural gemstone".