What I Konw About Gold
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Himfr Echo
For more specific information about fashion and jewelery, try visiting www.himfr.com,one of the most popular China jewelery trade platform on the web. By Himfr Echo
Published on Friday the 5th, 2008
What is gold
The dictionary says “Gold is a remarkable, rare metal, with an unparalleled combination of chemical and physical properties
What is gold?
The dictionary says “Gold is a remarkable, rare metal, with an unparalleled combination of chemical and physical properties. It is the only yellow metal and bears its name from the Old English word for yellow, 'geolu'. It is also the only metal that forms no oxide film on it's surface in air at normal temperatures, meaning that it will never rust or tarnish.”
And we also know that gold's chemical symbol, Au, comes from the latin word for gold, aurum. In the Periodic Table of Elements, gold is classified as a transitional metal with the following characteristics;
• Symbol: Au
• Atomic number: 79
• Atomic mass: 196.96655 amu
• Number of protons/electrons: 79
• Number of neutrons: 118
• Melting point: 1,064.43°C (1,337.58°K, 1,947.97°F)
• Boiling point: 2,807.0°C (3,80.15°K, 5,084.6°F)
• Density @ 293°K: 19.32 grams per cubic centimeter
• Crystal structure: cubic
Quality
Gold's purity is measured in karats. 24 karat is pure gold, but its purity means it is more expensive and less durable than gold that is alloyed with other metals. Different alloys are used in jewelry for greater strength, durability and color range.
The karatage of the jewelry will tell you what percentage of gold it contains: 24 karat is 100 percent, 18 karat is 75 percent, and 14 karat is 58 percent gold. When comparing gold jewelry, the higher the number of karats, the greater the value.
Karat Marks
WWhen buying gold jewelry, always look for the karat mark. Always look for the karat mark or "k" that appears on the back of the piece. In addition to the karat mark, every piece of gold jewelry should be stamped with a hallmark or trademark of its maker, and sometimes its country of origin. These designations assure you that you are buying genuine karat gold jewelry. Heavier pieces contain more gold.
Gold Color
Yellow gold is alloyed with silver and copper. It is the most frequently used type of gold there is. Malleable, ductile, and generally non-corrosive, it has a high melting point and is not susceptible to compression.
White gold is alloyed with a large percentage of silver, or a selection of other white metals. The percentage of gold naturally varies, according to the amount of other metal used. White gold is highly reflective and not subject to tarnish. The ancient term for it was Electrum. Its use predates that of Palladium and Platinum.
Gold pricing is based on a number of factors, including karatage, gram weight, design and craftsmanship. The karatage and gram weight tell you how much gold is in a piece, but don't rely on these alone to determine price. Remember, a price based solely on gram weight does not reflect the work that has gone into the piece.
Other important factors to consider are the jewelry's construction and design. The techniques of construction can make a piece more durable and flexible for added comfort. A well-made piece in a classic design will give you years of wear and enjoyment and, if cared for properly, will last a lifetime. Unique design, intricate details, gemstones or a special clasp may add to the price.
Gold jewelry is mainly produced by machine. Any additional hand finishing or textural interest raises the cost. Similar looking pieces may have vastly different price tags. This is because different pieces may have specific characteristics that make them unique. So look carefully to notice any differences and similarities. Often, it's these small details that give you pleasure through the years that you enjoy a piece of jewelry, and ensure that your children will also enjoy it.
The dictionary says “Gold is a remarkable, rare metal, with an unparalleled combination of chemical and physical properties. It is the only yellow metal and bears its name from the Old English word for yellow, 'geolu'. It is also the only metal that forms no oxide film on it's surface in air at normal temperatures, meaning that it will never rust or tarnish.”
And we also know that gold's chemical symbol, Au, comes from the latin word for gold, aurum. In the Periodic Table of Elements, gold is classified as a transitional metal with the following characteristics;
• Symbol: Au
• Atomic number: 79
• Atomic mass: 196.96655 amu
• Number of protons/electrons: 79
• Number of neutrons: 118
• Melting point: 1,064.43°C (1,337.58°K, 1,947.97°F)
• Boiling point: 2,807.0°C (3,80.15°K, 5,084.6°F)
• Density @ 293°K: 19.32 grams per cubic centimeter
• Crystal structure: cubic
Quality
Gold's purity is measured in karats. 24 karat is pure gold, but its purity means it is more expensive and less durable than gold that is alloyed with other metals. Different alloys are used in jewelry for greater strength, durability and color range.
The karatage of the jewelry will tell you what percentage of gold it contains: 24 karat is 100 percent, 18 karat is 75 percent, and 14 karat is 58 percent gold. When comparing gold jewelry, the higher the number of karats, the greater the value.
Karat Marks
WWhen buying gold jewelry, always look for the karat mark. Always look for the karat mark or "k" that appears on the back of the piece. In addition to the karat mark, every piece of gold jewelry should be stamped with a hallmark or trademark of its maker, and sometimes its country of origin. These designations assure you that you are buying genuine karat gold jewelry. Heavier pieces contain more gold.
Gold Color
Yellow gold is alloyed with silver and copper. It is the most frequently used type of gold there is. Malleable, ductile, and generally non-corrosive, it has a high melting point and is not susceptible to compression.
White gold is alloyed with a large percentage of silver, or a selection of other white metals. The percentage of gold naturally varies, according to the amount of other metal used. White gold is highly reflective and not subject to tarnish. The ancient term for it was Electrum. Its use predates that of Palladium and Platinum.
Gold pricing is based on a number of factors, including karatage, gram weight, design and craftsmanship. The karatage and gram weight tell you how much gold is in a piece, but don't rely on these alone to determine price. Remember, a price based solely on gram weight does not reflect the work that has gone into the piece.
Other important factors to consider are the jewelry's construction and design. The techniques of construction can make a piece more durable and flexible for added comfort. A well-made piece in a classic design will give you years of wear and enjoyment and, if cared for properly, will last a lifetime. Unique design, intricate details, gemstones or a special clasp may add to the price.
Gold jewelry is mainly produced by machine. Any additional hand finishing or textural interest raises the cost. Similar looking pieces may have vastly different price tags. This is because different pieces may have specific characteristics that make them unique. So look carefully to notice any differences and similarities. Often, it's these small details that give you pleasure through the years that you enjoy a piece of jewelry, and ensure that your children will also enjoy it.