I wish the author had not used the words "Abandoned Mine in the Atacama Desert" Abandoned mine would've been fine. But now you've communicated the value of your find and given a basic hint of what mines to look up. The bright side is so far, author is probably fine because nobody's buying quantum crystals yet in a futures market.
At least the author has time to secure property rights and buy out old mines.
The vast copper-producing region of the US has large areas of similar mineralization. If they found it in the Atacama then you can find it in the US as well.