I found some inspired by jewelry on Etsy, particularly from Colorblock Shop (click HERE). The necklaces shown below retail for $30 and $42 respectively. Click HERE for the green/blue version and HERE for the orange one.
Similar necklaces could also easily by DIY, click HERE or HERE for some tutorials. Another great place to stalk is the Etsy store Spike The Punch, a favorite of Glitter Guide and other bloggers. She doesn't have any similar necklaces in the store now, but you can see past work on their Facebook page HERE.
Bauble Bar also has a great option on presale for April, which retails for $38. Click on the image below to preorder! It also comes in pink, try code bbmine2012 for the month of February for 14% off.