Diamond professionals use the grading system developed by GIA in the 1950s, which established the use of four important factors to describe and classify diamonds: Clarity, Color, Cut, and Carat Weight. These are known as the Four C s. When used together, they describe the quality of a finished diamond.
0. Most Americans adjust their clocks for Daylight Saving Time (DST) once in the spring and once in the fall -- but residents of two states, Hawaii and Arizona, have chosen not to observe it. This clocks stands in a city park in Glendale, Arizona. Wikimedia Commons. Arizona participated for one summer.
Syracuse, N.Y. -- This weekend, we'll say goodbye to daylight saving time. Again. The official time change occurs at 2 a.m. Sunday, when we all set our clocks back to 1 a.m. (Confession: I change my clocks when I wake up Sunday.). The good news is you'll get an extra hour to sleep. The bad news is on Monday we'll be complaining how dark it is on the way home from work.