Several ways to pick gold jewelry@thereal.su

Posted by lisa on January 17th, 2018

Gold jewelry refers to the gold as the main raw material of jewelry. The chemical symbol of gold is Au, the specific gravity is 17.4, the Mohs hardness is 2.5. Gold jewelry from its gold content can be divided into pure real 18k gold Van Cleef Butterfly Bracelet gold and K gold two categories. Gold gold jewelry in the gold content of 99% or more, up to 99.99%, so there are “99 gold”, “full gold”, “red gold,” said. K gold jewelry is in its gold material by adding other metals (such as silver, copper metal) made of jewelry, also known as “open gold”, “golden color”. Due to the addition of other metals have less, they formed a K gold jewelry different K number. 12K, 50%; 10K, 41.66%; 9K, 37.5% 8K, the number of K and the gold content are as follows: 24K, 99% or more; 22K, 91.7%; 21K, 87.5%; 18K, 75% 33.34% 6K, 25%
In gold jewelry, pure gold jewelry texture is soft, teeth bite printed, easy to bend, golden color, pure, soft, feel heavy, there is a heavy feeling. K gold jewelry texture slightly hard, teeth bite no print, color is yellow with white, and according to the number of K, white gradually increased, yellow faded. K gold jewelry feel less than gold jewelry heavy. In addition, whether it is pure gold or K gold jewelry with a printed label Gold jewelry on the stamp, useful “gold”, but also useful “Kg” English real 18k gold Van Cleef Fly Beauties Butterfly Necklace letters that texture. When the amount of gold is indicated, the words “99” or “24K” indicate that it is pure gold jewelry. K gold jewelry is marked with the corresponding K number, such as the “18K” K gold jewelry, the gold content of 75 %. In addition, the jewelry also marks the origin of different manufacturers signed the label. Really gold jewelry, printed standard, complete, clear, is an important identification mark.
Easy to mix with gold jewelry more types of jewelry, some gold-plated Cartier love bracelet replica jewelry, some gold jewelry, some copper jewelry, and some copper alloy jewelry. Here’s a brief description of what it is:
Gold-plated jewelry is in the other metal jewelry surface plating with a layer of gold plated, the color and gold jewelry is similar to the golden light, the new harder to identify. But gold-plated jewelry feel more light, texture hard, teeth bite no print, with a long time easy to fade. Some poorly plated gold-plated jewelry, the color is not red is white, or flowers.
Gold jewelry is in other metal surface package 24K or 22K gold foil, such as gold foil K is too low, its poor flexibility. The appearance of gold and gold jewelry is similar to gold jewelry, glittering, and not easy to fade, make people really difficult to argue. But carefully observe the depression of jewelry, angle, behind, etc., can be found in gold rugged, with Alice from the skin of the phenomenon. Such as jewelry on the broken joints, can be seen from the metal material section is outside the yellow and white. In addition, the gold jewelry jewelry feel lighter, the texture is more pure gold jewelry hard, teeth bite no print, easy to bend, long wearing gold foil easy to fall off the skin.
Bronze jewelry color for the yellow with red, fake, shiny dark, soft texture, light weight. Copper alloy jewelry (copper-tin alloy), the color white, light quality light, long wear fade, will make the skin black.
Whether it is gold-plated jewelry, gold jewelry, or copper jewelry, Asian gold jewelry, generally do not like a similar gold jewelry seal Or stamped with different gold jewelry, if any jewelry engraved with the English letter “GK”, its meaning is “gold”. Or printed letters obscure, crooked, consumers should real 18k gold Van Cleef Between the Finger Ring identify whether the jewelry printed on the seal, whether the seal in line with the above provisions, the seal is clear and other aspects of content to determine the authenticity of gold jewelry.
There are many ways to identify gold jewelry, Chinese folk summed up a set of simple methods, the formula is: to see color, weigh weight, listening rhyme, folding hardness, stone grinding, contrast card, with acid point, The first four sentences by the eyesight, with the feeling; after four need to use tools and reagents.
One, look color
According to the different luster and color of gold can be roughly distinguish between pure gold, K gold, gold, fake gold. That is, gold is red and yellow is better, fineness in more than 95%; positive yellow color in about 80%; green and yellow color in about 70%; yellow slightly gray color in about 50%. So there are formulas for the “seven green, eight yellow, nine five red, yellow and white with gray on half gold.” If the jewelry from the beginning of the long time, there are “copper green, silver black, gold never change color” argument.
Second, look at the density
The density of gold is 19.32 g / cc, which is about twice the weight of silver, lead Cartier love ring replica and tin. Available formula: a certain gold jewelry quality (g) than the amount of gold jewelry (cubic centimeters) is equal to the density. Find the density of the measured gold jewelry, the density of 19.32 g / cubic centimeter is pure gold or pure gold, otherwise it is non-pure gold or color of the poor gold (the law of jewelry without any destructive).
Three, folding hardness
Gold has the characteristics of ductility and hardness, can be pressed into a thickness of 12.7 microns. When the color is high, you can leave a mark with a pin or a nail. More than 97% of the fineness of gold jewelry, bending two or three times, the bend at the wrinkles, also known as scales; 95% of the fineness of gold jewelry, bending real 18k gold Panthere de Cartier Necklace feel hard, fish scales are not obvious; 90% Jewelry, bending is very hard, no fish scales; with more gold jewelry, bending two or three times that is broken; such as gold production, bending is broken, the section has obvious sand. Use this method should take into account the width of the jewelry and thick, thick, wide on the hard, thin, narrow on the soft.
Four, listening rhyme, see flexibility
High gold jewelry by the percussion or hard to throw, the issue of “puff, puff” boring boring, and no phonology, no stretch, K gold phonology, sound, elastic, the greater the elastic, phonology The more the more the older, the worse the fineness.
Five, with the touchstone identification fineness
The use of gold on the card (has determined the fineness of the gold medal) and the subject jewelry in the touchstone on the ground, by comparing the color to determine the gold jewelry fineness. This method should be carried out under natural light and fluorescent lamps, not in direct sunlight and incandescent lamps.
Six, with acid point
In the touchstone were grinding out the jewelry and the licensing of the gold, with Cartier nail bracelet replica glass rods point of nitric acid in the gold, because the chemical stability of gold elements, not with acid reaction, so the color unchanged. If gold or non-gold, gold is disappear or change. The law of change is “three fast, three slow”, that is, the low color of the disappearance of fast, high color disappearance slow; mixed gold disappeared fast, clear gold disappeared slowly; large mixed gold disappeared, Depending on the disappearance of the situation, compared to the card can determine the gold jewelry fineness.