Deadly Silver Fake Chinese Coins Again in Melbourne Auction Rooms....... Only these are worn right specs but only 1% Percent Silver
If its the right weight and density and only 1% of silver - would be interesting to find out what base metal with higher density of silver's they are using.
I think Peter start reading out the report maybe Spanner Monkey can remember I thought Aluminium was mentioned I'll see if I can get Roman to remember
Right shape ,wrong weight,I can't remember the weight,it's basically scrap steel underneath. The fake silver eagles I bought last year were the same underneath
Well if its Al than the coin would be about 2.5-3 times lighter than a silver coin and would be a quick give away. For them to make copies which have correct densities than they will have to add base metals which have a density around 10.5 to 1 as silver does. Nickel, copper are around 8-9 and aluminium is less than 4 to 1.
They had the right sound ,right feel to them, I'll take my fake Silver eagle to Peter this week & take note of what's actually inside
I dont rely much on the sound when i test silver coins. i do keep flipping them into the air and listening to the sound, but sometimes when i flip the 20 Cent piece they have very similar sounds. besides maybe the sound is dependant on the density of the coin you are flipping. i check the weight and the dimension of the coin when testing.
I actually strike the coin with another silver coin to hear the 'ting' and the worst thing was that striking both these teals they sounded looked felt like silver
Fake silver eagle - do you mean fake silver dollar from the 1800s-early 1900s? Or fake modern American Silver Eagle 1oz coin?
aluminium - melted 2560 - 2640 aluminium bronze (3-10% Al) 7700 - 8700 aluminium foil 2700 -2750 antifriction metal 9130 -10600 beryllium 1840 beryllium copper 8100 - 8250 brass - casting 8400 - 8700 brass - rolled and drawn 8430 - 8730 bronze - lead 7700 - 8700 bronze - phosphorous 8780 - 8920 bronze (8-14% Sn) 7400 - 8900 cast iron 6800 - 7800 cobolt 8746 copper 8930 delta metal 8600 electrum 8400 - 8900 gold 19320 iron 7850 lead 11340 light alloy based on Al 2560 - 2800 light alloy based on Mg 1760 - 1870 magnesium 1738 mercury 13593 molybdenum 10188 monel 8360 - 8840 nickel 8800 nickel silver 8400 - 8900 platinum 21400 plutonium 19800 silver 10490 steel - rolled 7850 steel - stainless 7480 - 8000 tin 7280 titanium 4500 tungsten 19600 uranium 18900 vanadium 5494 white metal 7100 zinc 7135
Sorry,.. Basically the list above shows the DENSITY OF METALS. So water ( at room temp & pressure ) would be 1000. So to reproduce a coin that is allegedly 925 silver for example - u will have to use metals heavier than silver if you will be mixing it with nickel. but if you only use nickel,copper, aluminium all of these metals are LESS dense than silver and you WONT be able to make a coin that BOTH weighs as much as it should and has the same diameter and thickness. Also note TUNGSTEN and GOLD - tungsten is the perfect metal to be used to fake gold bars. u can cast a tungsten bar and coat it with gold and traditional / low tech tests will all show that it is gold when in fact it wouldnt be. ** check out Aluminium 2.6 to 1 - so 1 oz Al coin would have a volume of around 4 times higher than silver 1 oz. Also note Platinum its 10% denser than gold and 100 % denser than silver ! So take any of your silver 1 oz 0.999 coins - and a Platinum coin with the same diameter would have HALF the thickness and still be 1 oz. Platinum is really the big daddy of precious metals.
I thought I read somewhere (probably on here!) that people used to mix Cu/Al with iridium and osmium etc to create 'correct weight and size' fake silver. Luckily these metals aren't cheap so there aren't many high level fakes like these floating around but if silver spot goes to the moon then >_< Just a random thought
