Black Sand With Nitric Acid

2008-2-4fine gold can become black with a mold or allege growth on itlook at the picture of my nugget of gold with the black growth on it the black sands can also be just like this nugget a lot of what you think is just black sand can be gold this is how you can recover it.

We are a world-class enterprise integrating R & D, production and sales, serving customers in more than 100 countries around the world in the field of mining. If you need, you can contact us.


Recent News

Copyright © 2019 TENIC Company All rights reserved.Sitemap