Hi everyone, I brought a new Update, and this time is about Gold Facts, I hope you enjoy…
• Gold’s chemical symbol is AU. It comes from the Latin word “Aurum” which means shining dawn.
• Gold is resistant to corrosion. It will never rust
• An ounce of gold can be hammered into a 100 square foot sheet
• Gold is measured in troy ounces which is heavier than the standard ounce. 1 troy ounce = 31.103grams
• Gold is completely recyclable
• Gold is the most ductile and malleable of all the metals. One ounce can be drawn into a wire that stretches five miles
Gold is a very rare substance making up only five ten-millionths of the Earth’s outer layer.
(Imagine 10 million coins in one place and only 5 of them were made of gold!).
Its rarity and its physical properties have made it one of the most prized of Earth’s natural resources.
Gold, like iron, copper, lead, etc. is a metal. Metals are good conductors of heat and electricity and are almost all solid at room temperature (with the exception of mercury). They are malleable and ductile.
Chemical Symbol: Au
Name Origin: From the Old English word geolo (yellow)
Symbol Origin: From the Latin word aurum (gold)
Date of Discovery: circa 3000 BC
Atomic Number: 79
Atomic Mass: 196.96655 amu
Melting Point: 1064.43 °C (1337.5801 K, 1947.9741 °F)
Boiling Point: 2807.0 °C (3080.15 K, 5084.6 °F)
Relative Density: 19.3
Hardness: 2.5-3 on Mohs scale
Gold is heavy — it weighs over nineteen times more than water, and is almost twice as heavy as lead.
If you had enough Gold to fill a one litre milk carton, it would weigh 19.3 kilograms, the same volume of milk weighs only one kilogram.
Gold is quite soft. It is slightly harder than a fingernail but not as hard as a coin or glass.
Gold, like most metals, can be hammered into thin sheets or drawn out into thin wires.
This has made gold sought after for a wide range of applications, like jewellery and in electronics.
“Gold leaf” for example, is gold that has been beaten into a sheet less than one tenth of a millimetre thick.
It is then used for lettering on honour rolls in schools, or for putting gold onto picture frames and ornaments.
Gold is chemically very stable. It does not readily combine with other substances and, therefore, does not corrode or tarnish. Because of this property, it is found in nature almost always as pure gold. This is referred to as “native gold”.
This meant that the early humans could collect the gold and use it without having to smelt or refine the metal from a mineral — such is the case of iron.
Also, because Gold is soft and does not tarnish or corrode, it makes excellent jewellery, it is good as material for filling cavities in teeth, and it makes excellent fine wire for electronics.
Gold is very reflective, so it is used to protect spacecraft and satellites from solar radiation.
Industrial and medical lasers use gold-coated reflectors to focus light energy.
Measuring Gold - Troy Ounce
A Troy ounce is 480 grains, somewhat heavier than an avoirdupois ounce (437.5 grains).
A grain is exactly 64.798 91 mg; hence one troy ounce is exactly 31.1034768 g, about 10 percent more than the avoirdupois ounce, which is exactly 28.349523125 g. The troy ounce is the only ounce used in the pricing of precious metals, such as gold, platinum and silver.
The troy grain is used to measure bullet and gunpowder weights in shooting and arrow and arrowhead weights in archery. In troy weight, there are 12 ounces in a pound, rather than 16 as in the more common avoirdupois system. The troy ounce may be abbreviated to ozt.
The troy system of weight is named after the city of Troyes in France, and was widely used in Europe during the Middle Ages. It fell into disuse when other systems began to be preferred, continuing to be used only in the highly specialised fields of precious metals, gems and medicines, up to the nineteenth century. Today it is only used for the trading of precious metals and gemstones.
1 troy ounce = 0.0311 kilograms
32.1507 troy oz = 1 kilogram
1 troy ounce = 31.1034768 grams
Well my friends that’s all for today, leave your comments and any doubt or suggestion, just let me know, see u!!!
The methods of gathering gold changed rapidly as the ‘easy pickings’ disappeared. Tools were invented at a rapid rate as miners from all over sought new and more effective means of mining the ore. Here is a look at three basic stages in the evolution of gold mining.
The Early Days
Gold could be found loose in riverbeds. Miners would divert streams, sending smaller streams off to each side, leaving stream beds exposed. The dry days of summer and early fall were best as low water levels exposed stone areas where gold may have been hiding.
Land ownership became an issue as gold grew scarcer and the population grew. A miner could claim an area from 10 to 50 square feet as their own.
A piece of personal property signified claim.
This claim was filed with the camp’s claim officer.
If not worked within a certain amount of time, it could be claimed by another miner.
1 Placer mining
Using shallow metal pans, miners mixed water with soil from the riverbed. By gently swirling in circular motion, the lighter soils washed away, leaving the gold.
Chileans, Sonorans from Mexico and Indians gently bounced dry soil on wool sarapes. Wind took the dried sand, leaving the heavier gold.
3 Crushing quartz
This and similar devices of Mexican origin were powered by mule, horse or man. Quartz was crushed between a heavy stone above and tightly fitted stones beneath. The pulverized soil was then processed through traditional mining techniques. Although effective, most Americans considered the process too slow.
4 The rocker or cradle
With one man to load water and soil and a second to rock it, this gold washing machine could process 200 bucketfuls per day.
It is set on sloping ground to allow water to run through it.
Wooden or metal spikes were fastened on the bottom level to catch heavier gold.
5 The long tom
With a two men, it is capable of handling 400-500 bucketfuls per man per day.
1. Miner shovels dirt into the long tom.
2. Another removes large rocks and keeps dirt moving through the trough and across an iron plate with holes in its bottom.
3. Sand and gold drops through holes.
4. Particles of gold lodge in the riffles of a lower box while sand washes away.
5.The final separation is done by panning.
Wooden flume widens at one end.
A downward slope allowed water to run through it continuously.
6 The waterwheel
Introduced by the Chinese, it could be placed in a bypass flume. The water- driven wheel powered various mining operations.
It powered the bailers needed to keep the working area dry.
Water and paydirt are lifted into the sluicing flume.
Although widely used, this method was not very profitable as gold deposits were more frequently found along river banks and bars than in the main river channel.
Into the Earth
Once the earth’s surface had been picked clean, miners organized into larger camps and began digging deeper into the earth.
10 Quartz or hardrock mining
Shafts were sunk and large machinery was needed to remove the veins of gold from the quartz rock. Drilling could be done by hand or by compressed air-drill. Dynamite was placed into the holes created and detonated.
8 Hydraulic drills
A hole would be started using a drill bit. As the hole deepened, bits would be exchanged for progressively longer and narrower ones. Water was added to the hole to create a grinding compound and to help remove dirt and debris.
9 The stamp
Larger rocks removed from the mines were crushed by these machines.
Rock was fed from bins into dies at the base of the machine.
Heavy iron crushers called stamps rose and fell onto the rock.
Pulverized soil was then processed using traditional mining methods.
By 1858, only those with big machinery could effectively mine the hills. Individual miners and their small claims were replaced by large companies that worked large tracts of land, employing scores of men. Many of the miners moved on to newer diggings in such places as Pike’s Peak in Colorado and Nevada’s Comstock Lode.
10 Hydraulic mining
This method was developed to explore the soil of older, dried riverbeds and later, any available soil.
1. Riveted pipes guided water down from higher elevations. As the water travelled down, its pressure increased.
2. The water was channeled into iron nozzles called monitors.
3. By this time, the pressure was sufficient to blast away hillsides.
4. The monitors were systematically waved back and forth, boring into the land.
5. The soil would run down into a valley and a series of sluices where the silt and water would be separated through traditional mining techniques.
The environmental effects of hydraulic mining
Water that was diverted to dry land created a boggy mud that destroyed habitats and flooded the land of farmers living downstream.
Sources: “The Great American Gold Rush” by Rhoda Blumberg, “The Gold Rush” by Liza Ketchum, “The California Gold Rush,” published by American Heritage, “The California Gold Rush” by Elizabeth Van Steenwyk, “Hunting for Gold” by William Downie.
Have you ever heard of Caz??? If you haven’t well I think you’re gonna like this is amazing…
The prospector, identified only as Caz, made the lucrative find under an old riverbed in Ballarat by using a metal detector.The gold, which was found inside a 4.8kg hunk of quartz, is believed to weigh close to 76 ounces.
With recent economic turmoil sending the price of gold to $1600 an ounce, Caz was overjoyed but keen to keep his identity and the location of his prize discovery a secret. A week after his find Caz dug up a smaller nugget worth $20,000.
Caz told the Ballarat Courier about his excitement at finding the larger quartz piece.”As soon as my finger tips wrapped around the rock and I started to lift, I knew it was way heavier than just stone, ” he said.
Ballarat’s Mining Exchange Gold Shop owner Cordell Kent said the find had prompted hundreds of others to take to Victoria’s gold fields.”The gold rush is still on,” Mr Kent told Nine News.
Recent technological improvements in the equipment used to track down gold have also contributed to a greater interest in prospecting. “The newer technology is giving a greater depth and obviously the better depth you have the more chance you have of finding something,” said Mark Day, a spokesman for metal detector manufacturer Minelab.
Wow! Isn’t it gorgeous??? And he found it with a Metal Detector… You never know what you’re gonna find with it, life is totally full of surprises, a gold nugget could be anywhere, you just need to be patient and persistent… Well guys see you in my next update, I”ll be happy to read all your comments, and know more about you, so see u…
The price of gold has lots of Arizonans getting a metal detector to try and find a treasure.
"This is what gold looks like right out of the ground," said Rob Allison, pulling six ounces of gold out of his pocket. "This gold was found with a metal detector. There are different sizes from little tiny nuggets to some bigger ones. The biggest gold in my hand is about three quarters of an ounce."
The handful of gold he had is worth about ten thousand bucks. Allison is a longtime prospector. He sells metal detectors as the owner of Rob’s Detector Sales. He said there are a lot of tools to use in prospecting.
Well Arzona, got it!!! What do you guys think about this??? I’ll be waiting your comments, See you later folks…