Good luck dragging that bit o' glass away from the neutron star it orbits... ;)

 

Brings up a good point, though. If something considered a commodity down here is found in abundance out there, I wonder if we'd really go for it?

Let's say there was a diamond even 1/100th the size in orbit somewhere in the Solar System... right here. Or what if it turns out that the Moon had some titanic deposit of them (why not? it's made of the same basic stuff Earth is). What would DeBeers say abuot that? They won't be exactly eager to see the basis of their wealth turn into a cheap commodity, now would they? I suspect they'd either find some way to hold claim to it, or they'd go out of their way to sabotage any effort to get it (politically, physically, you-name-it). 

Some things would be worth it no matter what, and there'd be a rush for it - gold (excellent for electronics, plating, anti-corrosion, etc), silver (ditto), and water ice are good examples (seriously - the stuff can be turned into fuel, breathable air, and of course drinking/washing/etc water all in one go).  

 

Some things OTOH? They may have a high value here, but in many cases it is only because of rarity. We can literally make our own diamonds (usually for industrial uses), after all...