Hermesetas; a nice replacement for sugar in my tea and also a nicely-shaped data module; some kind of plug-in Data Storage Device.
Specifically, they remind me of the Ancient data modules in Stargate: Atlantis.
While I think it might be easier to make the Ancient-style DSDs from thick plastic card, the hermesatas plug-ins work as removable data modules. Problem is, I'm still working on how to give them the crystal look using paintjobs. I figured that I can draw on silver/gold circuitry, but need a glass/crystal effect for the pieces themselves.