concreting in space

Message The way to look at it is this: the only thing which makes lunar material "ores" (which is only defined as material from which it is economical to extract a substance) is the high cost of lifting materials off the Earth. If not discussing in the context of major construction programs in cislunar space, we would call these ores "dirt", which is in fact what it is. It's like TangoMan said, who's your competition? Launch costs make dirt off the Earth economically competitive with the most highly prized ores found on theEarth.

Regards,
Mike Combs

I don't
want to go too far into Mining metallurgy, but there are some very
basic misconceptions that I hear with respect to lunar materials.
The first one is that the various percentages of mettles reported by
the Apollo analysis are readily available..