Let's review. An ephelis, or freckle, is a type of macule, which is a small (up to 1cm in diameter), circumscribed, flat, and thus nonpalpable change in the pigmentation of the skin. By nonpalpable, I mean you can't feel it. Or more specifically, you can't feel any difference between it and the surrounding 'normal' skin.
The troy ounce is the standard silver price that you see on the t.v. 1 troy ounce = 31.1034768 grams or 1.09714 U.S. Ounces. It is usually just referred to as an oz.
These trade based on the spot metal prices. As of Friday, July 16, 2004 at 19:00 ET, silver was trading at $6.71 / troy ounce. As of 3-11-08 at 8:54 a.m. silver is worth $19.93 per troy ounce.