Made-from-CO2 concrete, lululemons and diamonds spark investor excitement

[rcjordan]

https://www.reuters.com/business/sustainable-business/made-from-co2-concrete-lululemons-diamonds-spark-investor-excitement-2021-10-04/

[ergophobe]

I don't see diamonds getting us to 10b tonnes/year, but if concrete used a significant amount of captured CO2 (instead of releasing large amounts), that would be huge.

I would love to see the cost of man-made diamonds fall and undercut the natural kind. That would be a huge win too.

[rcjordan]

>diamonds

World's biggest jewelry giant shifts to lab-produced diamonds as millennials shun mined gems
https://finance.yahoo.com/news/world-biggest-jewelry-giant-shifts-153834609.html


>concrete

Yeah, I'm wondering what the real net-net of co2-laden concrete would be.

[Brad]

> concrete

I too would like to know the net-net of CO2 concrete.

I'd also like to know how good it is, that is, how long does it last.

I've seen roads paved with concrete in the 1920's or earlier that are still usable.  The original concrete has been torn up in places for sewer and water main work over the decades but the original pavement remaining has outlasted the concrete patches.  Whatever the original type of concrete was used was it higher quality and probably thicker than we use now.  My point being that is CO2 concrete really saving CO2 if we have to replace it more often?

[buckworks]

>> undercut the natural kind

Consider moissanite. You may know silicon carbide as an industrial abrasive ... the sandpaper in your workshop ... but when grown into crystals by the laboratory wizards it has a higher index of refraction than diamonds.

Not much of a carbon sink, but sparkle plenty!

I'm wearing a moissanite ring as I type this.