Gold Rush

There were several gold rushes throughout history which drew droves of eager prospectors from all over to an area pregnant with the promise of wealth and prosperity to those lucky enough to find the golden nuggets nestled waiting within the earth's crust.

This image sprang to mind while reading that an Australian man recently uncovered a large amount of gold in the northern goldfields of western Australia worth up to $110,000.  I really hadn't realized that the dream of striking gold was still alive for some.  Then I really thought about it, where does gold even come from?

Recently discovered "Duckfoot"

For years I've written on the history of gemstones and jewelry and why they are so preciously expensive, but why is gold precious?

Gold is an element and lives on the periodic table as a transitional element with the atomic number of 79.  It is considered to be one of the least reactive chemical elements and is the most noble of all the noble metals, making it the most resistant to corrosion.

Gold is considered very rare since it is believed there is only a finite amount in the solar system that was present as dust the day it formed. So whatever we have on earth is what we get, it does not have a recipe to form like a gemstone does. It is an element created on a celestial level and cannot be reproduced.  Gold ore is found in solid form usually as a nugget, granular, or in veins, but also exists as flakes and dust.  Gold does not have a habit formation like a gemstone does further proving it is the most malleable of all the metals.  When found during mining, what is being found is gold that is by chance clumped together in a mine-able form, and sometimes this gold is naturally alloyed with other elements and is not pure. To get pure gold, it must be refined to extract impurities and other metals.

  

Gold in it's purest form is very soft and to be used for jewelry needs to be alloyed with another metal for strength and sometimes color.

The most familiar karats of gold are:

10K or .417 meaning 41.7% pure gold alloyed with other metals like silver, copper, zinc, and/or nickel.

14K or .585 meaning 58.5% pure gold alloyed with other metals.

18K or .750 meaning 75% pure gold alloyed with other metals.

24K  or 999.9 is considered fine gold at 99.95% pure gold.

10k is much harder and more durable than 18k or 24k but not as rich in color is the main difference between these karats besides gold content and price.

For example I chose 18k for my engagement ring because it's rich color to matched my yellow center, and I know I'd be gentle with my ring knowing that it will be more susceptible to scratches and nicks.  For someone hard on their jewelry I always recommend 10k or 14k.