Here is another favourite way of mine to wear black shatter. I get so many compliments when I wear it like this. The 'gradient' isn't really a gradient but rather three lines-but the shatter over top really pulls it together and makes it look like a gradient. It's fun and easy and works with a lot of different colours.
For this one I used a yellow base just to make the colours really pop, then did a line of pink and orange. Then came a coat of Seche Vite just because I didn't want to wait for the polish to dry (it's best if you apply shatter polish over dry nail polish) before applying OPI Black Shatter.