A check mark
in accordance with the relevant provisions of the state, gold and silver jewelrymarks shall include material name, gold (silver, platinum) quantity. One piece of gold and silver jewelry weighing less than 0.5 grams or it is difficult to label, markcontent can be exempt from. Jewelry equipment a gold and silver jewelry made of gold, silver, platinum 3 precious metals two or 3 kinds of production, the name of precious metals and gold (silver, platinum) amount shall be as mark content.
two, sensory test
purchasing a piece of jewelry, first through sensory testing, jewelry equipmentwhich can be divided into: look at the color, gold to dark yellow, gold yellow, red,and white color, and gold imitation products for the copper alloy, shallow color.Weigh weight: gold for the proportion of 19.3g/cm3, much higher than the proportion of gold imitation products, such as a pure gold ring is 5 grams, and gold imitation product of the same size generally less than 3 grams. Hardness: gold is soft, with a pin can scratch, bite a tooth marks. Jewelry equipment
buy jewelry, also need to carefully examine the inlaid stone, welding firm, has no fault, burr, trachoma and other.
if need to know exactly the content of precious metal jewelry or qualitydisputes, should go to the jewelry quality inspection institutions, physical or chemical analysis methods of identification.
How to maintain gold jewelry
At present, the gold market is divided into pure gold and jewelry, gold jewelry,jewelry equipment according to the provisions of the state standard GB1188789"precious metal jewelry naming method" in several kinds of gold jewelry, in common for the:
24K -- currently on the market occasionally labeled 24K gold jewelry,according to the national standard, 24 karat gold content theory value should be one hundred percent. None is perfect, so strictly speaking, 24K is not exist, salesmarked with 24 karat gold is not correct, not in conformity with national standards.
thousands of gold -- gold content is 99.9%, commonly known as the 999.
gold -- gold content is more than 99%. Commonly known as the 99.
18 karat gold -- gold content of 75%. Gold a variety of colors, often yellow, red,white points. The white gold is gold and nickel alloy, zinc, copper and other elements, it is not usually said platinum jewelry. Platinum is a platinum (Pt).
gold jewelry worn and stored, should avoid and contain lead, mercury (Shui Yin) and other elements of the items contact, otherwise it will make jewelry surface discoloration jewelry equipment. Take a shower when working, should be taken to prevent wear jewelry, or bump, but do not force pulling in order to avoiddeformation or fracture.
jewelry worn after a period of time, there may be dirt, color dark, use detergentsoak, using a soft bristle brush gently scrub, rinse with water, can wear dry.