This is glass sand. What an ingenious way to recycle/reuse glass. Apparently it has many uses; for sand blasting, hydroponics, landfill cover, applications in landscaping or lawn ornaments.
It can be added to pottery, used as a drainage material, ice control instead of salt, and an asphalt product dubbed glasphalt.
It looks like it would make really pretty things, like stepping stones. It would give products a sparkly texture and be very useful.
I love this website because it's all about becoming green. They also give links to other websites providing additional reading material on how glass bottles can be crushed into fine sand and then used for other things.
The crushing process must include a polishing of the sand so that it isn't a handful of sharp little objects. It almost looks like little round beads.
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