What is gold?

What is gold?

 Gold is a precious metal known by the chemical symbol Au. It is like in most cases, the abbreviation from a Latin word. Latin Au Aurum can be literally translated to "morning twilight". His magnificent occurrence of uncommon brilliance and become the determinants of its value.

As the precious metal does not react with water and oxygen as well as being resistant to most acids. It is resistant to weather. It is a soft metal melts already at 1064.18 ° C (boiling at 2856 ° C), which is a big advantage during the production of jewelry.

The occurrence of gold

Gold occurs in the earth's crust. By creating two basic types of deposits, primary and secondary.

Primary deposits - Associated with high-temperature hydrothermal veins, intersecting effusive rocks with quartz veins and rocks metamorphic transformations resulting from volcanic rocks.

Secondary deposits - Associated with okruchowymi rocks, arising as a result of destruction (weathering, Blurring) incremental reserves earlier. Found in alluvial sands and gravels and also in the sandstones and conglomerates. In a dendrite, formed wires, and fine dust (so-called flour gold) common are forms small lumps and considerable nuggets 

 The largest nugget of the world

 The largest named Welcome Stranger nugget was found in the Australian state of Victoria. The discovery was made on February 5 1869 only 5 cm below the surface. Nugget measured 61cm in 31cm. His weight was 74.04 kg. With a solid wytopiono 70.5591 kg of gold. Gold was sold for £ 19.068 (today it would be about 1, 4 million £).

Rate Solid Gold Content

 

Solid Gold

An attempt is a way of determining the gold content of gold in the alloy, expressed in parts per thousand. If the rate is 50% gold content, we say that This is the 500th gold sample

There is another way of determining the purity of gold:

• first attempt at gold - 960
• second attempt of gold - 750
• third attempt of gold - 585
• Fourth attempt Gold - 500
• Fifth trial gold - 375
• Sixth trial gold - 333

There another division of the purity of gold, expressed in terms of carats, where 1 corresponds to the content carat weight 1 / 24 pure gold in the alloy:

• 24 carat - test 1000 - by definition
• 22 karat - 916 test
• 18 karat - 750 test
• 14 karat - 585 test
• 12 karat - 500 test
• 10 karat - 417 test
• 8 carats - test 333

So the gold a second attempt can be defined as:
750 gold sample containing 75% pure gold 18 carat gold