Is there any way you could tell apart a sovereign made with 14k gold as opposed to 22k? Would it weigh more, have a larger diameter?
The specific gravity test sounds quite effective for gold. What are the limitations and risks when using SG?
The SG test would be as accurate as the control measures put in place so their could potentially be some 'user introduced' inaccuracies. With chemical analysis there is no debate; it is what it is. Each to their own in terms of what comfort blanket they need/desire. Disclaimer: I am directly associated with BullionNZ
Regarding the specific gravity test involving water... I recently bought a medallion, seller believed it is bronze, however I believe it may be 18k gold: http://www.taxfreegold.co.uk/1972debeersdiamondresearchlaboratorysilverjubileegoldmedallion.html (Google can't find any references to bronze versions of this medallion) Can the sg test help me to determine if the medallion I received is 18k gold? Wouldn't this require I know what the alloy consists of? Or would an XRF test be better here? Thanks!
I suppose 24 k gold (kuges) is harder to counterfeit ,in terms of density,than 18k. (I.e sovereigns,koalas,..) Does any realistic mix approach 18k? Might be why the Asian demand 24k.
Yep,my sorry.Sov ,etc are 22k as well.. I suppose coin used as currency coins are,at a max. They can't be too soft. Collector coins and bars can be 999. Maples are 999. Still the question remains. Does the difference in density make 90% much difference in terms of counterfeitablity.
