This is a part of a necklace. The slipper, or sandal, is not longer than 15 mm. Without knowing I believe it is made of the pearly part of a shell and silver. I though it would a bit different from all the bees, flies and butterflies. I placed the tiny slipper on glossy white paper, and used only the natural light in the room. I also used a tripod. This could easily have been a Fairy's slipper.

Camera Model Canon EOS 400D DIGITAL
Shooting Mode A-DEP
Tv( Shutter Speed ) 1/60
Av( Aperture Value ) 4.0
ISO Speed 100
Lens 17.0 - 70.0 mm
Focal Length 17.0 mm
Image Quality RAW
Flash Off
White Balance Mode Custom
AF Mode Manual focusing
Picture Style Neutral