EPA Approval, page-8

This part of an article I found from the WSJ in Nov 15.

It's just a snippet as I am not subscribed.
I have hope yet that even if we don't mine it someone will value it and we may just make a buck.
D

How 3-D Printing May Give Miners a New Dimension
Miners are positioning for a potential surge in demand for commodities used in 3-D printing
By
RHIANNON HOYLE
Updated Nov. 11, 2015 4:03 p.m. ET
SYDNEY—Global miners including Rio Tinto PLC and Iluka Resources Ltd. have long made a pile of profit from digging up a sludgy commodity known as mineral sands, then shipping it to countries such as China where it is used to whiten bathroom tiles or in household paints.

Now, these miners are shooting to be at the forefront of technological change—supplying the same commodity for use in 3-D printing. They are working on ways to cut the cost of producing titanium dioxide, the compound commonly produced from mineral sands,...