The image for this is really really huge, so let me throw it behind a cut so it doesn't screw up your feeds and junk.
This is Ice Cascade, a sparkly futuristic-style crystal necklace. The drop is made from 3 white Dione beads. It hangs just above the breast. The chain had to be extended, which is why the top part of the chain is a lighter color and a different link style than the rest of it...it is only seen from the back, and those who think the lighter color looks too odd up against the rest of the chain might prefer wearing it with their hair down.
The piece is rather asymmetrical, and the stones on the right side are one link higher than the stones on the left. The image sort of got cut off, so just click it to see it in full.