First need to prepare tools, electronic scales accurate to the best, my only accurate to 0.001 g 0.01 g, so the measurement result there is little error! Such accurate to 0.001 electronic scales generally jewelry stores, playing jindian have, you can borrow, and called on the two data! need a cup of water, not full, soaked in jewelry (Note that hollow, impervious jewelry can not be measured) to a long point below the hair officially measured:
The first step, said the weight of the jewelry to Tiffany Jewelry, for example, the ring weighs 5.40 grams;
The second step,Water placed on electronic scales, then the tare key, if there is no tare key is only the total weight minus the amount of skin;
The third step, is the most important step, said the weight of the hanging water channeling jewelry, hair hanging water inside the weighing, note that the jewelry must be soaked all jewelry must not touch the wall and bottom of the cup, hand Do not touch the cup. hair as little as possible point dip in the water as much as possible to reduce the error! measurement is completed, then that is calculated jewelry weight divided by the hanging water, the resulting data with this jewelry metal density ratio to draw the gold content of the piece of jewelry.
Algorithm is as follows: Jewelry 5.4 divided by the hanging water 0.28 is equal to 19.285714286, divided by the density of the gold 19.36 is equal to 0.996162928 Cheap Tiffany Tiffany Charms Outlet gold content is 99.6%, this data is a little error, if accurate to 0.001 can be measured to more than 99.9% but we buy almost a few tenths of jewelery content also does not matter, a few tenths of a percent of the gold, there is a difference of a couple of dollars, they do not buy 24K gold into a 22K or 18K on the line, 24K is more than content of 99%, 22K is a content of 92.5%, 18K content of 75% platinum and silver of the measurement method is also the same, just with the last calculated data platinum gold and silver density ratio is platinum and silver content! (platinum iridium platinum can not use this method to measure) this method is not very accurate method, if you need accurate data Geological Bureau or to go to the professionals!, the method introduced here up slightly.
