Materials: silicone mold, tissue paper, glue, embossing powder
The mold I used today is from Dollar Tree and meant for making a coaster.
I lightly misted the mold with water, then lined it with tissue large enough to cover the mold and overhang the edges by several inches. I brushed on some regular white glue, then layered more tissue. I used tissue cut into sixths, nine layers, which is about 1 1/2 sheets of tissue paper altogether. Once all the tissue was layered and pressed into the mold, I folded the overhang into the mold, continuing to brush on glue and misting with water.
I’m impatient, so instead of allowing to dry overnight I stuck the mold on the baking tray in my toaster oven at 200 degrees Fahrenheit (about 95 degrees Celsius) for an hour. The silicone mold will not melt at any temperature safe for paper, which as we all know from enforced English class reading is Fahrenheit 451 (232 Celsius) (the book was by Ray Bradbury.)
After unfolding the embellishment, I used embossing ink and glue stick to adhere embossing powder to the edges and surfaces of the embellishment and then heated with my heat tool to melt the powder.
Short process video: https://youtu.be/BlWfYn2vHHY
Papercraft Crystal 