9 ct gold - best bang for your buck!

[Aurora et luna]

I bought 2 different 9 ct medallions from separate sources.
These two examples was purchased from a bullion dealer
Both of them were tested on different brands of XRF machines at different dealerships
Both hallmarked 9 ct, however their fineness shows up much higher than expected when tested.
Just puzzled why its purity is around 11 ct and not 9 ct.

 

[Aurora et luna]

My bad! When you sold all those 9 ct bling recently at around spot, I should have warned you about these results.

 

[Eureka Moments]

I bought a 9ct medal a while back engraved date early 1900's. Will try and get it tested next time I'm in Melb.

 

[Ian Gillman]

It might be a legal thing, if you say 9ct you had better be 9ct or better but not worse.

 

[Ultimate Gold and Bullion]

Also could be plated or the medals were originally made from mixed old gold. Or it could've just been a miscalculation! Well done on scoring some extra gold!