wholesale jewelry supplies in india How to identify Lao Fengxiang gold jewelry?

boho chic wholesale jewelry [导语]老凤祥黄金首饰该如何鉴定?老凤祥黄金首饰的鉴定方法很多，中国民间总结了一套简便方法，其口诀是：看色泽、掂重量、听音韵、折硬度、石上磨、用酸点、 Fixed into color. The first four sentences depends on the eyes and the feeling; the latter three sentences need to be used by tools and reagents. How to identify Lao Fengxiang's gold jewelry? There are many ways to identify the gold jewelry of Lao Fengxiang. The Chinese folk summarizes a set of simple methods. Its formula is: look at color, weight, listening rhyme, hardness, stone grinding, acid dots, and color. The first four sentences depends on the eyes and the feeling; the latter three sentences need to be used by tools and reagents. First, see the color and color of the color according to the different gloss and color of the gold, you can generally distinguish the pure gold, K gold, real gold, and fake gold. That is, gold is better with red yellow, and the color is more than 95%; the positive yellow color is about 80%; the blue and yellow color is about 70%; the yellow color is slightly gray and the color is about 50%. Therefore, there is a formula for "seven greens, eight yellow, nine five red, and yellow leucorrhea ash. For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color". Second, folding hardness gold has the characteristics of ductility and less hardness, and can be pressed into thin pieces of 12.7 microns. When the color is high, marks can be left with large head needles or nails. More than 97%of the gold jewelry, after two or three times, wrinkles appeared at the bend, also called fish scales; about 95%of gold jewelry, it feels hard when bending, and the fish scales are not obvious; The jewelry is very hard when the bending is bent, and there is no fish scale pattern; the gold jewelry containing more impurities, the bend is twice or three times to break; When using this method, the width and thickness of the jewelry should be considered. The thick and width should be hardened, and the thin and narrow ones are softer.三、听音韵、看弹性成色高的黄金首饰受敲击或往硬地抛掷时，发出“噗嗒、噗嗒”的沉闷低声，且无音韵、无弹力，K金有音韵、有声、有Elasticity, the greater the elasticity, the more the rhyme, the more older, the worse the color. Fourth, the density of density gold is 19.32 grams/cubic centimeter, which is about double the same volume of silver, lead, and tin. Available formula: The mass (gram) of a certain gold jewelry (gram) is equal to density than the volume (cubic centimeter) of a certain gold jewelry (cubic centimeter). Seeking the density of the gold jewelry measured, the density is about 19.32 grams/cubic centimeter, it is pure gold or more pure gold, otherwise it is a non -pure gold or color difference gold (this method has no destructiveness to the jewelry). 5. Use the test gold stone to identify the color of the gold -pairing card (the gold medal identified as a color) and the test jewelry on the test gold stone. Through the contrast color, the gold jewelry is determined. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps. 6. Use acid dots to grind the golden trails of identified jewelry and cards on the testing stone. Try nitric acid on the golden road with a glass stick. Because the chemical properties of the golden element are stable and do not react with the acid, the color remains unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes. The law of changes is "three fast, three slows", that is, the low -quality disappearance is fast, and the high color disappears slowly; Depending on the disappearance of its golden road, compare cards can determine the color of gold jewelry.