Gold Jewelry Facts...
Gold Rarity
Gold is said to be so rare that the world pours more steel in an hour than it has poured gold since time began which makes gold jewelry so sought after.
Gold for jewelry is one of the world's most precious metals.
All of the gold in the world could be compressed into an 18-yard cube, which is about 1/10 the mass of the Washington Monument.
It is recorded that only 88,000 tons of gold have been taken from the earth since recorded history, leaving far more yet to be discovered for use making gold jewelry.
A one-ounce gold nugget is more rare to find than a five-carat diamond.
The amount of gold nuggets being found in the world is less than one percent.
Even though gold is rare, it is far easier to find than winning a major state lottery.
Because of its rarity, a gold nugget can be worth three to four times the value of the gold it contains.
An authentic gold nugget has long been considered a gemstone because of its rarity and beauty and is highly prized for gold jewelry.
Gold is so heavy that one cubic foot of it weighs half a ton.
Gold is six to seven times heavier than other materials that equal its size.
The largest gold nugget found in the U.S. weighed 195 pounds; it came from gold mining in California.
Gold can be hammered so thin that sunlight can shine through it.
A single ounce of gold can be drawn into a wire 60 miles long.
Gold can be hammered into sheets so thin that a pile of them an inch high would contain more than 200,000 separate sheets.
In every cubic mile of sea water there is 25 tons of gold! That's a total of about 10 billion tons of gold in the oceans; however, there's no known way to economically recover it.
Gold is considered one of the most important metals in gold jewelry making.
Gold is so soft it is seldom used in its pure form especially in gold jewelry.
Gold jewelry that is marked 10K is made of 10 parts gold, and 14 parts other metals.
The hardness of pure gold (on moh's scale) is 2-1/2 to 3; the melting point is 2,063 degrees Fahrenheit, specific gravity is 19.32, and tensile strength is 19,000psi.
Gold can be transmitted from platinum by nuclear reaction. But, because of the rarity of platinum, it is far too costly for gold jewelry.
The United States government banned private ownership of gold wxcept for gold jewelry, which lasted 41 years; then lifted it on December 31, 1974.
Gold reached an all-time high price of $800 per ounce in 1980 which sent gold jewelry to all time highs.
South Africa is the largest producing gold country in the world today but exports for gold jewelry.
An ounce of gold is based on troy weight--20 pennyweights or 480 grains. A pound of gold is 12 ounces, while most other non-precious metals are based on the standard avoirdupois scale of 16 ounces to the pound, and approximately 32 grams to the ounce. When buying gold jewelry make sure you trust your gold jewelry sales professional.
Gold is chemically liquified and injected into the muscles of thousands of rheumatoid arthritis victims in the U.S., and it is said that the treatment is successful in seven out of ten cases.
Gold is used in many ways besides gold jewelry including window glass and astronaut helmets to reflect infrared rays while allowing sunlight to pass through, and at the same time keeping it cool.
Gold is inactive chemically and is not affected by air, heat, moisture and ordinary solvents which makes it perfect for gold jewelry.
The largest gold mining operation in the U.S. is the Homestake Mining Company in Lead, South Dakota.
Gold In The Rough
The chemical symbol for gold is Au, from the Latin aurum, which means 'shining dawn'. Aurora was the Roman goddess of dawn which links to the warm, yellow colour of gold. Gold and Copper are the only two non white coloured metals.
Gold and copper were the first metals to be discovered by man, around 5000BC, and together with silver these three metals are found in the metallic state in the earth's crust. Gold mining is still active in its metallic form in over 60 countries around the world.
Gold is referred to as a precious and a noble metal. Gold has an excellent chemical stability with a high resistance to corrosion and oxidation which makes it perfect for gold jewelry. However, this is just one of the many properties that gold possesses, which when considered in combination with each other have led to a number of exciting and often unique industrial applications as well as gold jewelry.
The purity of gold is measured in Carats. A Carat was originally a unit of
mass (weight) based on the Carob seed or bean which was used by ancient merchants
in the Middle East. The Carat is still used for the weight of gem stones where
1 carat = 200mg. For gold jewelry the grading used to measure the purity where
Native Scottish gold is amongst the purest at 22.8
carats!!!
Here is a brief description of gold. |
Here is a brief summary of the isolation of gold. It would not normally be necessary to make gold in the laboratory as it is readily available commercially. The most romantic way to extract gold is by panning it out from a stream in some pleasant valley but most such sources are now depleted. Panning relies upon the density of gold (which is very high) being much greater than that of the sand and other particulates. It therefore settles to the bottom of the pan. Today, more often than not, gold is extracted from ores. These ores often contain relatively little gold. Some of these processes cause environmental concern. The ore is crushed to a powder so as to expose the small gold particles. These are dissolved by treatment of the rock with cyanide solution in air. The result of this is a gold cyanide complex. Addition of zinc powder to the resulting solution precipitates out the gold. 4Au + 8NaCN + O2 + 2H2O ? 4Na[Au(CN)2] + 4NaOH 2Na[Au(CN)2] + Zn ? 2NaCN + Zn(CN)2 + Au (s) |