I've started on the emitter, making the two silver bits from pens and a green drink stirring thingy, it won't light up but hey-ho. The stirrer is twisted so not quite right but it I think it will look good none the less. As for the green crystal in-between the rods... erm...
I think for the block they are attached to I'll use Lego, plate it with card then layer the detail over the top, makes it easier to get the size and shape while being sturdy, when it's carded in you won't be able to tell it's Lego. The phone dummy won't arrive for a few days but I think I can get the block and emitter done by then using the dimensions given on the Samsung website.