Depending upon the conditions, either nucleation or growth may be predominant over the other, and as a result, crystals with different sizes and shapes are obtained (Control of crystal size and shape constitutes one of the main challenges in industrial manufacturing, such as for pharmaceuticals).
For the region, see San Fernando Valley. San Fernando is a city located in the San Fernando Valley, in the northwestern region of Los Angeles County, California. It is completely surrounded by the City of Los Angeles.
It is a suburban city of the San Francisco Bay Area, and lies in the San Ramon Valley. San Ramon's population was 72,148 as of the 2010 U.S. Census, with an estimated population of 74,378 in 2012, making it 4th largest city in Contra Costa County, behind Richmond, Concord and Antioch.