My Jewel quilt

I have come to a stand still, I have run out of black, and have only a small bit of the coloured fabric left, so for the time being my Jewel quilt is hanging on my curtains, I look at it each time I come past, and it still has not come to me what might be next.
I was going to put four borders on, one bright ( a solid colour) and then black and then the original fabric that I used plus another black. The only problem with that is that there is just not enough fabric left. My daughter thinks I should make diamonds all the way round, but I am not convinced. We will see.