Yep. Now the thing is, there IS a troy pound and that would be the correct pound to state gold weight in. However, there are only 12 troy oz in a troy pound, whereas there are 16 avoirdupois oz in an avoirdupois pound. Thus, even though an oz of gold is heavier than an oz of feathers, a pound of gold is lighter than a pound of feathers.
Other interesting units, a "gallon" can be US liquid, US dry (rare), or an Imperial gallon (UK). UK vehicles get 20% better mpg because their gallons are 20% larger. Great way to save gas, eh? We should start using their Imperial gallons to help show those oil companies who's boss.