I finally got it right! ....I hope :P
Thank you very much Deidre at Blade Rubber Stamps for your detailed explaination :)
For the next time I think I will use less of the "rust" color, and more of the blue and green.
The stencil and the Perfect Pearls I bought in the Blade Rubber Stamps store in London.
The frame is a gold mirror cardstock from my collection of papers.
And here is another one based on the same technique: