For this design, I experimented with a dry marble technique using a nail stamper and silicone mat.
I started by painting my thumb and ring finger in a light cream shade. I then used liquid tape around these nails to help with cleanup later.
On the rest of the nails I used 2 coats of a metallic blue shade. On the blue nails, I used a few black petrol effect rhinestones to add a bit of decoration to those nails.
On the remaining nails I added the dry marble effect. To do this I painted a square in the cream shade large enough to cover the nails onto a silicone mat. On top of this I blobbed a few drops of the blue shade randomly. I also did the same with a lighter blue polish.
I then dabbed my nail stamper on top of this a couple of times to blur the colours together and then stamped it onto my nail. If I felt the effect was lacking in certain areas I picked up more polish from the mat quickly before it dried too much and stamped it again. I then removed the liquid tape and cleaned up around my nails.