How to determine the percentage of gold. 

The gold is there a way to determine the percentage of gold as a simple way. 

1. A piece of gold that will check the seasoning. To scratch the surface of the black stone. A rectangle. The skin is seen as a golden light. (If there is no black stone. The paper Sand the number 600 or 1000). 

2. Use nitrate or use a small paintbrush dipped in nitrate Spread evenly over the surface in gold on black rock or gold on paper sand. Gold Nitrate meat will not be bitten. Will be limited to other alloys. 

3. Visually estimate the surface area remains the area where the gold is gone. If the missing half. Shows that the percentage of specimens for about 50 percent gold.

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