I do like it, and I think the color range gives you a lot of versatility. Not sure about it with a turquoise dress though. I guess I'd have to see the dress. I'd probably pair it with neutrals (beige/khaki, black, white, navy) to really play up the contrast.
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"Good taste shouldn't have to cost anything extra." - Mickey Drexler
I have 'd that necklace ever since I first saw it in an alloy catalog. I agree with atlgirl that I would pair it with neutrals. As colorful as the necklace is, I think you want it to be the standout piece.
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Some people collect stamps and coins--I collect shoes.
I agree with Bloomie and Altgirl. You want that necklace to be the stand out piece. I'd pair it with a simple sheath dress or even a t shirt in any neutral color. Turquoise is such a great summer color that when I wear it, I want the turquoise to be the stand out item.