I need help to identify is this coin fake or not? I preciate all help what i can. http://i55.tinypic.com/2zt9cf4.jpg http://i56.tinypic.com/4j864j.jpg http://i56.tinypic.com/14tsdxe.jpg Best.regards spwaw
I think it real, it is valued at 300 Yuan. Only way to nondestructively tell is with a specific gravity test. Should be reasonable to do since it is so large. Testing chemicals would damage the application point. Jim
The specific gravity of silver is 10.5 approx. To find sp.gr = mass( weight grams) / volume (ml or cm^3). This will be a rough method. The weight~ you will need to confirm the 1000 grams as we are testing it might be a fake ( non-silver). The volume is where one will have to maybe make something. In a lab we would use something with a diameter greater than the coin and marked on the side with ml. up to 250 ml at least , 500 ml better. If you don't have a cylinder like this find a plastic container just slightly larger than the diameter of the coin, and a measuring container that will hold 10 ml exactly. I have a small clear measuring cup that came with cough syrup that is graduated to 30 ml in 5 increments. so now you have the weight ~~ lets say it is 1000 grams. so let's make the container accurate. We hope the volume of the coin then is about 95ml to make the sp.gr. 10.5, so put in lets say 150 ml ( this number can vary as long as the coin will be covered with water when inserted) Before adding the coin,use a magic marker to draw a fine line at the top level of the water (0). Then add 10 ml and draw another line ( mark this one 10), add another 10 ml water, mark this one 20, repeat, 30,40,50,60,70,80,90,100,110,120. So now you have a cylinder marked from a baseline 0-120. start with the cylinder containing water to the 0 mark. add the coin slowly, and try not to get much water on your fingers or use latex gloves. The coin will displace its volume in water, so the water level hopefully will then be between 90 and 100 mark, which would indicate silver, since it is probably so anyway. If you want a closer estimate, then you can place marks from 90 to 100, by starting with 90 and adding 1 ml at a time ~91, 92,93,94,95,96, etc. and repeat with the new marks. Since this is a large coin, you can get close without laboratory equipment. Now there are other method of determing specific gravity or density, so other suggestions may come in. The metals that might be used in fakes are usually less than 9.5, so you have room for error. We use a liquid for determining the volume as measuring it and do the math, wouldn't account for the variations of the surface. Sorry so long as it is simple, just have to explain it Jim
does tempel top too round? I found real ones Panda pictures on web and it seems that tempel top is not so round?
Weigh it, then compare its dimensions (diameter, thickness) with the real thing. If they all jive, it's probably real.
