High-grade fire clays can withstand temperatures of 1775 Â°C (3227 Â°F), but to be referred to as a fire clay the material must withstand a minimum temperature of 1,515 Â°C (2,759 Â°F). Fire clays range from flint clays to plastic fire clays, but there are semi-flint and semi-plastic fire clays as well.
La Mesa, California. La Mesa, California. La Mesa is a city in Southern California, located 9 miles (14 km) east of Downtown San Diego in San Diego County. The population was 57,065 at the 2010 census, up from 54,749 at the 2000 census. Its civic motto is the Jewel of the Hills..
Costa Mesa, California. Costa Mesa is a city in Orange County, California. The population was 109,960 at the 2010 United States Census. Since its incorporation in 1953, the city has grown from a semi-rural farming community of 16,840 to a primarily suburban and edge city with an economy based on retail, commerce, and light manufacturing.