The processing of gold

Very rarely are found to contain no gold telluride. This is explained by the fact that the goals is the only element that is easily attached to gold. Usually this takes the form of gold ore. Sometimes found in association with native gold.
Also in group sulphides and an amount of minerals is called ‘gold bad’, (best known as pyrite), who got that name from the resemblance to gold in color and brightness. What differentiates these minerals is still gold just its malleability and density.
Associated minerals: quartz, nagyagit (Sacaramb), Calavera, Silvana, krennerit, pyrite and other sulfides.
Quality indicators: color, density, hardness, malleability.
Prehistoric man used gold foils making some rudimentary jewelry (bracelets, idols, etc.) that shape after his appeal, subjecting them to beating with a hammer.

Ore rich in gold, as the vein was cut came with a lot of patience in grinders, mortars, made first in stone, and iron. Grist slurry was produced in the past for selecting gold.
After several repetitions of the operation of washing, the bottom well the pieces of ore, a few drops of golden glow. The second phase occurs at lower factory master. Here, pieces of rock are subjected to preliminary grinding to a concentrator, which aims to separate ore tailings.