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.
For silver, the spot price reflects the current price for one ounce of pure silver. Thus, a silver spot price of 17.54 means that silver is currently valued at $17.54 per ounce.What is tricky about spot price is that it is the base price of the metal; you cannot actually buy physical silver or silver ETFs at spot price.