the gold content is divided into 10 grades. According to the national standard gb11887-89, the gold content per carat is 4.166%. For example, 8K = 8 * 4.166% = 33.328% (333 ‰)
gold is the elemental form of the chemical element gold. It is a soft, golden yellow and corrosion-resistant precious metal. Gold is one of the rarer, more precious and highly valued metals. In the world, gold is generally measured in ounces. In ancient China, gold was measured in two ounces, which is a very important metal
methods to distinguish true and false Gold:
1. Look at color
the higher the purity of gold jewelry, the darker the color. If there is no gold medal, the general quality can be determined according to the following color. The fineness of deep red yellow is more than 95%, that of light red yellow is 90-95%, that of light yellow is 80-85%, that of cyan is 65-70%, that of cyan with white light is only 50-60%, and that of slight yellow with white is less than 50%. The seven green, eight yellow and nine red can be referred to
2. Weight
the specific gravity of gold is 19.32, which is heavier than silver, copper, lead, zinc, aluminum and other metals. Gold is 40% heavier than silver, 1.2 times heavier than copper and 6.1 times heavier than aluminum. Gold ornaments should feel heavy in your hands, while fake gold ornaments should feel light
3. Look at the hardness
pure gold is soft and low in hardness. It can make shallow marks with nails, leave tooth marks when teeth bite. Gold ornaments with high quality are softer than those with low quality. The more copper they contain, the harder they are. Bending method can also test the hardness. Pure gold is soft and easy to bend. The lower the purity, the harder it is to bend
the gold content is divided into 10 grades. According to the national standard gb11887-89, the gold content per carat is 4.166%. For example, 8K = 8 * 4.166% = 33.328% (333 ‰)
gold is the elemental form of the chemical element gold. It is a soft, golden yellow and corrosion-resistant precious metal. Gold is one of the rarer, more precious and highly valued metals. In the world, gold is generally measured in ounces. In ancient China, gold was measured in two ounces, which is a very important metal
methods to distinguish true and false Gold:
1. Look at color
the higher the purity of gold jewelry, the darker the color. If there is no gold medal, the general quality can be determined according to the following color. The fineness of deep red yellow is more than 95%, that of light red yellow is 90-95%, that of light yellow is 80-85%, that of cyan is 65-70%, that of cyan with white light is only 50-60%, and that of slight yellow with white is less than 50%. The seven green, eight yellow and nine red can be referred to
2. Weight
the specific gravity of gold is 19.32, which is heavier than silver, copper, lead, zinc, aluminum and other metals. Gold is 40% heavier than silver, 1.2 times heavier than copper and 6.1 times heavier than aluminum. Gold ornaments should feel heavy in your hands, while fake gold ornaments should feel light
3. Look at the hardness
pure gold is soft and low in hardness. It can make shallow marks with nails, leave tooth marks when teeth bite. Gold ornaments with high quality are softer than those with low quality. The more copper they contain, the harder they are. Bending method can also test the hardness. Pure gold is soft and easy to bend. The lower the purity, the harder it is to bend