Valerie Percyne is a D&D character i play on a weekly basis. She's a warlock and her patron is an eldritch horror from the beyond. They're best friends.
So of course, she has an amulet that lets her talk to him. It's supposed to look slightly different every time you look at it, but that's a little hard to do with blender, so i took a single idea for what the amulet looks like, and modeled that. It's comprised of seven golden tentacles surrounding a large ruby at the center. Were i to re-do this, which i may at some point, I'd make the tentacles straight instead of sculpting them with some curve, and add a bone structure so i could easily render a number of positions and never show anyone the same one twice.
The renders i did in cycles use some cool materials i found online:
Gold: http://blendermada.com/materials/detail/96-polished-gold/
Ruby: http://blendermada.com/materials/detail/16-ruby/
Valerie's Amulet.
Materials added in sketchfab, as they didn't export from blender. The refractive index of the ruby is 1.77 which is realistic.
One of the Tentacles as sculpted in sculptris.