After a couple thousand years of computational evolution, if you don't think there'd be a possible reason for leaving behind massive silicon crystals... Well, you haven't been reading enough science fiction.
If you could grow pure crystals more easily (thinking Diamon Age), why not have giant plates serving as a piezo generator or ambient electromagnetic waveguide harvesters?
If you could grow pure crystals more easily (thinking Diamon Age), why not have giant plates serving as a piezo generator or ambient electromagnetic waveguide harvesters?