I used a pattern from the blog Rose Hip. In case you want to try it too, I took pictures of each step in the pattern to help you visualize it:
For the inside of the flower, I used a Cascade 220 yarn in a dark gray/black, which I had left over from another project. For the pedals and border, I used ella rae classic, colors 47 (rose) + 104 (silver heather). I used a size H/8 crochet hook.
See my inspiration here.