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.
A Colorado woman found an 8.52-carat diamond at Arkansas' Crater of Diamonds State Park at Murfreesboro. The gem found by Bobbie Oskarson of Longmont is the fifth largest diamond found at the park since 1972. She named it Esperanza for her niece's name and the Spanish word for 'hope' and plans to keep the diamond.