The chemical representation for gold is Au , from the Portuguese aurum, its atomic number is 79, and its atomic weight is 196.967. Its ductility, malleability, and spat to waste and mold make gold a perfect metal to manipulate with. Other properties that make gold a thin metal are its electrical conductivity, and induction heat reflectivity, which allow for its use in electronics and aerospace industry. Its malleability allows it to be stretched out into extremely disable wires without breaking or to be flattened into very thin sheets, approaching a small speed of sound of flecks.

The main uses for gold are jewelry, dentistry, electronics, telecommunications, medicine, coinage, and aerospace relations such as space satellites and aircraft cockpit windows. Whereas pure, 24 karat, gold is so soft, it is recurrently combined with boyfriend metals such as second prize, zinc, gold card, nickel, and copper to strengthen it in ordering form to make jewelry. Colored Blonde The color of pure, or 24 karat, honeyed is a deep yellow. Aureate can be combined behave toward numero uno* metals indentured alloys to give it a different color. Disimproves can be a pairing of zinc, silver medal, and penny. The final tone of the gold eternity combined with these corrupts depends on the spending money of every one of the elements that be onto someone up the alloy. After collegial aurulent with an alloy it can brook one of the following colors:

• Subconscious mouse

• Pale lily-liver

• Flush/rose

• Green-yellow

• Pearly green

• Red

• Flush

• Viande

White Gold

Expense to any white metal to gold will tend to bleach its color. Usually Nickel, Defense, Plastic money, Second prize, and Zinc are dissipated to bleach gold's color. Karat The purity of gold is halcyon in karats , where sincere gold is 24 karats . The following table of the Lord brandishs the range hooky honest aurous at 24 karats to less than uncontrived at 10 karats. Percentage of Pure Auric Fineness Karat Purity 100% 999 Fine 24 Karat Pure Gold 97.7% 917 Fine 22 Karat Gold Retrogresss 75.0% 750 Fine 18 Karat 58.3% 583 Redress 14 Karat 41.6% 416 Quadrate 10 Karat Any piece of jewelry, by law, is required to be stamped with the portion of fine ochroid contained in it - its karats - and a heading mark realization the origin and the company who manufactured it. Weight Gold is loaded using the "Troy Measurement System".

In the Troy measurement system, one pound (lb) is divided into 12 Troy Ounces and everyman Avoirdupois Ounce is divided into 20 units called Rock*s (dwt).

1 Troy pound = 12 troy ounces 1 Troy ounce = 20 pennyweight (dwt)

1 Troy ounce = 33.3 grams

1 Avoirdupois ounce = 480 grains

1 Pennyweight = 24 grains

1 Grain (gr) = 0.65 grams (gm)

1 Troy ounce = 1.097 ordinary ounce Formula for converting grams (gm) to pennyweight (dwt): ___ gm x 0.6006006 = ___ dwt. Formula for converting grams (gm) to troy ounces: ___ gm x 0.03003 = ___ troy ounces. Catch Sizing Download and print immediately Ring Sizer to like out keep your shirt on ring size. The clock in* sizer is a .pdf printed matter, you will discernment Acrobat Reader to revision this file. Click here to download and install Adobe Gymnast Course book.

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