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Open Question: what jewellery & accessories would match my lilac formal dress?

hello
my high school graduation formal is coming up in a few weeks, and im stuck on what jewellery to wear..
my dress is a lilac colour, and my shoes and clutch bag are a satin black..

this is my dress (its the one on the right):
http://www.efcsite.com/manufcols/sherrihill/2010fallcollection/zoom/2261crop.jpg

can somebody give me a few ideas on what jewellery to wear? and if possible to match gold or smokey eye makeup? i dont want to wear lilac makeup because i dont want to be matchy matchy

thanks!