Silver refining has been used from ancient times to change the characteristics of the metal. Early metallurgists refined silver by heating it a couple hundred degrees above its melting point and holding the metal at an elevated temperature for a period of time.

Prospectors often wonder why gold deposits in veins like it does. Why is one vein rich while another is barren, even though they are only a few hundred feet apart?

Gold specimens that include visible crystal formations are among the rarest, most attractive and most valuable forms of gold to be found.

They… create negligible fumes and much less fly rock than blasting. Below are some tips on maximizing your effectiveness with these tools.

If Epd is larger, then the compressor will be spinning faster than the manufacturer’s maximum specified RPM and might destroy itself. If this happens, then the compressor again might not produce enough air to support a diver. Neither is a desired outcome.