Wasn't Clark's computer crystal a bit suspect? Looked like Kryptonite and it was from Krypton thank goodness it wasn't green. I suppose on Krypton they had harnessed the power of crystals to focus that into perhaps quantum computers? The amazing thing is it worked simply as a crystal, which could grow in to those more complex structures. Building its self, becoming a massive computer, housed in a giant crystal building complex. Sounds impossible, but what are we? We grow from a single cell in to far more complex bodies.
If you want to grow your own GREEN Kryptonite see link to your right. (great for teaching kids crystals) Green you will love and keep as a treasure in a lead box forever and red, well you could buy red but you would love it then toss it aside saying "I dont care for that anymore"