Thanks Maridje... Here is another view... Its the clearest and closest I have...
To me (and I have seen different angles) the largest blue central drop stone is Sapphire..but the rest are not...and the reason I say that is because they are very light, sparkly and color is not saturated as sapphire normally is..however, the central blue stone on the bottom of the necklace is more muted and not as transparent...
Definitely moonstones and pave set diamonds the rest...but blue stones are either tanzanite (my close guess) or something else...but my gut feeling tells me its tanzanites...