Gold

1
Gold

• Gold, a valuable metal, comes in two natural
  forms.

Gold Ore
Gold Nuggets
2
Gold Ore

• Gold ore is found usually on metallic rocks.

3
Gold Nuggets

• Chunks of gold, usually grain, thumb, or fist
  sized.

4
When was Gold Discovered?

• Around 3000 B.C.

5
Where is Gold Found?

• Rivers and streams
• Mines
• Minute traces in seawater
• Ores
• Earths Crust

6
How did Gold Get Here?

• Sometimes by volcanic activity, forcing gold to
  the surface.

7
How did Gold Get Here? (2)

• Also forming on the surface by itself.

8
How to Get Gold?

• A pan to sieve out gold from silt in rivers.

9
How to Get Gold (2)

• A Long Tom, a faster way for river sieving

10
How to Get Gold (3)

• You can also mine for gold.

11
Gold Properties

• AU, Aurum
• Conductor
• Malleable
• Boiling Point 2660 C
• Melting Point1060C
• Dense

12
Uses of Gold

• Jewellery.
• Gilding
• Ornaments
• Dental
• Coinage
• Electronics
• Textiles
• Industrials

13
Alloys

• Pure gold is too soft to be used.

14
Alloys (2)

• It needs to be combined with metals to be harder.

15
Another use for Gold

• Gold Bars, which can be stored in vaults.

16
How to get Gold Bars

• The bars are formed by placing molten gold in
  moulds.

17
Gold Value

• Gold is valued in Carats. 24 Carat means pure
  gold.

18
Fake Gold

• Iron Pyrite looks like gold, but its not.