[adgjlsfhk1]

I do somewhat doubt that the economics would work out. Silicon wafers are expensive, but I'm not sure if the price is currently higher than that of launching a bunch of sand to low earth orbit.

[kiba]

You wouldn't launch sands to LEO, but the equipment used for bootstrapping a mining operation on the moon or asteroid.

[pixl97]

I think the point is you'd be able to build products in space that you cannot build on Earth for any cost currently.