maybe just a modelling wheel on still soft fondant?
Looks like they used an impression mat.
Hope this helps.
Thanks Buttercream rose!!!!
I really like the tutorial on that page, it will allow me to control the size of the diamonds + I have a cereal box that's going to be empty once midnight comes *I love my midnight snacks* It will be empty and I will be able to make a tracer
Thanks so much!