If you don't already own a laminator, the project can get quite pricey. In that case I suggest you use an old CD which you can colour with acrylic paint.
Okay, so there really isn't much to it. Just cut out two small and one larger triangle, colour them all and put them in a laminator sheet and in the laminator itself. Once you're finished, make holes in the triangles and attach some metal rings. Put on a piece of wire, chain, you name it!
Note: I decided to only put the largest triangle on the wire. The smaller triangles will one day become earrings.
My triangles were coloured differently on each side. One side is blue and the other one yellow.
There you have it! Your own statement necklace that took less than ten minutes to make.