Yes, like gold, the silver spot price is used around the world for 24-hours per day trading. The silver market closes only for 60 minutes per day on weekdays, from 5:00 PM EST to 6 PM EST. The COMEX mainly sets the price of silver per ounce, and other markets too (e.g., The bars design is straightforward and features the Ohio Precious Metals mintmark. Every bar is also stamped with its purity of .999 fine silver along with its stamp denoting 10 Troy Ounces. In addition, the 10 oz OPM Silver Bar is stamped where it is made: U.S.A. The obverse side of the silver bar features a pattern based on the OPM logo. A troy ounce of Silver is equal to 31.10 grams. It’s a unit of measure first used in the Middle Ages, originating in Troyes, France. You may notice that this is slightly heavier than the 28.35 grams we’ve come to expect from the standard ounce (also known as the avoirdupois ounce).