Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration. This simplified scientific description of crystallization does not give a realistic picture of how the process is accomplished in the laboratory.
San Diego County is a county located in the southwestern corner of the state of California, in the United States. As of the 2010 census, the population was 3,095,313. making it the second-most populous county in California and the fifth-most populous in the United States. Its county seat is San Diego, the eighth-most populous city in the United States.
San Diego County Fair (June-July) San Diego Pride (July) Comic-Con (July) Del Mar Racing Season (July-September) September-November: Autumn is a pretty sweet spot in San Diego tourism. Although tourists tend to linger well into September to soak up the last of the summer weather (average highs remain in the upper 70s), October and November see a drop in crowds as well as hotel rates.