Silver and gold, and other precious metals, are measured by the troy ounce, of 31.10 grams. The avoirdupois ounce, used to measure everyday items like beef, flour and chocolate bars in certain primitive backwards countries that haven't switched to metric yet, weighs 28.35 grams. Neither silver nor gold weights should ever be quoted in avoirdupois ounces, since that would just confuse everybody.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis