Mattson, Linda. History of the Village of Otter Lake, Lapeer County, Michigan. CMU Term Paper, 1971. Metamora Among the Hills: A History. Metamora Township, MI: Metamora Friends of the Library, 1979. Porter, Floyd W. The Triumphs of His Grace; A Pilgrimage of More than 140 Years by the People of God, Called Methodist at Lapeer, Michigan.
The Cullinan, which was found near Pretoria more than a century ago, was until recently acknowledged to be the largest cut diamond in the world, weighing in at 530.20 carats. In 1985 it lost the record to the Golden Jubilee, which was found in the same mine as the Cullinan and weighed 545.67 carats.
The 40.23-carat Uncle Sam, the nation's largest diamond, was found in 1924, and the perfect 3.03-carat Strawn-Wagner diamond was found in 1990. The Strawn-Wagner Diamond was cut in 1997 by the renowned diamond firm Lazare Kaplan International of New York.