Gold Jewelry History...

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Gold and precious metals have been worked by humans in all cultures where the metals were available, either indigenously or imported, and the history of these activities is extensive. Superbly made objects from the ancient cultures of Europe, Africa, India, Asia, South America, Mesoamerica, and North America grace museums and collections around the world.

Gold Jewelry Facts

In medieval Europe goldsmiths were organized in guilds and were usually one of the most important and wealthy of the guilds in a city. The guild kept records of members and the marks they used on their products. These records are very useful to historians, where they survive. Goldsmiths often acted as bankers, since they dealt in gold and had sufficient security for the safe storage of valuable items. In the Middle Ages, goldsmithing normally included silversmithing as well, but the brass workers and workers in other base metals were normally in a separate guild since the trades were not allowed to overlap. Usually jewelers were goldsmiths.

A goldsmith is a metalworker who specializes in working with precious metals, usually, to make jewelry, valuable flatware, platters, goblets, decorative and serviceable utensils, as well as ceremonial or religious items. Goldsmiths must be skilled in forming metal through filing, soldering, piercing, sawing, forging, casting, and polishing metal. Traditionally, these skills had been passed along through apprenticeships, however, more recently Jewelry Arts Schools specializing solely in teaching goldsmithing and a multitude of skills falling under the jewelry arts umbrella are now available. Many Universities and Junior Colleges also offer goldsmithing, silversmithing and metal arts fabrication as a part of their fine arts curriculum. Today, it is not uncommon for a goldsmith to study other arts in order to reflect the social implications of the products of the trade.

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More info on gold.

Other Names for Gold: Oro, Tesoro
Periodic Table information:
Symbol=Au
Atomic Number=79
Atomic Weight=196.96
Melting Point=1337.33 degrees Kelvin
Melting point= 2,063 degrees Fahrenheit
Specific gravity is 19.32
Tensile strength=19,000psi
Hardness=2.75 on Mohs scale
Is one of the "Transition Metals"

Gold Measurement:

Gold is measured in many ways but for some reason this precious metal is weighed in a system of measurements called "Troy Measurements". Troy measurements are such that one pound (lb) is divided up into 12 Troy Ounces and each Troy Ounce is divided up into 20 units called Pennyweight (dwt). Therefore, you must be careful when talking to someone about a quantity of gold. Make sure that the ounces you are talking about are the same ounces you are thinking about. Here are a few conversions to help you convert to other systems of measurement of mass.
One Troy lb (pound)=12 troy ounces
One troy oz=20 pennyweight (dwt)
One troy oz=480 grains
One troy oz=33.3 grams
One pennyweight = 24 grains

Formula to convert grams to pennyweight
____grams X .6006006 = dwt
Formula to convert grams to Troy Ounces
_____grams X .03003 = troy ounces
Other conversions that might help
one mg (milligram) = 1/1000 g
one g (gram) = 1000 mg, 14.4 gr (grains)
one k (kilogram) = 1000 g, 35 oz, 2.2 lbs.
one gr (grain) = .65 g (grams)
one oz (ounce) = 38.35 g
one lb (pound) = 16 oz, 454 g, .45 k