No, it's 31.10g per ounce. The price of gold is always quoted as troy ounces[1]. You used the figure for the avoirdupois ounce which is used for anything that isn't a precious metal[2].
Though it doesn't really affect the argument you're making since 28.35g and 31.10g are pretty close, but how do you not know about troy ounces as a "former jeweler" (as it says in your profile)?
That's like a doctor saying body temperature is 105F or 40C.
No, it's 31.10g per ounce. The price of gold is always quoted as troy ounces[1]. You used the figure for the avoirdupois ounce which is used for anything that isn't a precious metal[2].
Though it doesn't really affect the argument you're making since 28.35g and 31.10g are pretty close, but how do you not know about troy ounces as a "former jeweler" (as it says in your profile)?
That's like a doctor saying body temperature is 105F or 40C.
[1] http://en.wikipedia.org/wiki/Troy_ounce
[2] http://en.wikipedia.org/wiki/Avoirdupois