For this tutorial I have used some Translucent vellum and some Kraft Blank Note Cards from Kraft Outlet. This is cardstock vellum (28 pound weight) so it's a bit thicker than what you usually find in the stores and it's really wonderful to work with.
I also used some stamps, Versamark, opaque white embossing powder, an embossing buddy, a heat gun, some Copic Markers, and a two-way glue pen.
Here's a view of the finished vellum piece by itself on top of the note card.
And here's what it looks like with some white card stock behind the vellum. It really makes the colors pop.