"In it's simplest form, that is some technomagic." She confirmed. The crystal he looked at was mostly clear, with the wire running through it as if the crystal had been grown that way. "I had been trying to make them as a resistor at first, and had even grown the crystals around both a high-level resistor and a low-level one... but it had ended up failing, and the low-level one had become a capacitor anyway totally ignoring any resistive traits entirely." And as he held the crystal it started to glow. And Sarah made a face.
"I have actually thought of casing though. My stuff doesn't need the casing, earlier trials showed that it didn't really do anything to benefit or detract, it was basically an extra useless step. But." She took a dramatic pause and stepped over to the hard light generator giving it a good once over. "Casing may be useful in this situation, since she does use so much more energy, to prevent any bleed off, and actually might stabilize the intake a little more."