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.
George Stepp, a logger from Carthage, Arkansas, discovered this diamond at Crater of Diamonds State Park in 1977. Kahn later purchased the diamond from Stepp. The Amarillo Starlight Diamond. This 16.37-carat white gem is the biggest diamond found by a park visitor following the Crater's establishment as a state park in 1972. W. W. Johnson of Amarillo, Texas, found this impressive diamond in 1975 while vacationing here at the park with his family. The diamond was cut into a 7.54-carat marquise-shape. The Esperanza Diamond. This 8.52-carat white diamond was found in June of 2015 by Bobbie Oskarson of Colorado. Clear white and icicle shaped, this gem is the fifth largest diamond found by a park visitor since the park was established in 1972.