Earth

"Earth" is an abandoned Gem colony planet and the location where most of the events of Steven Universe take place. Earth contains many native species, with the dominant sentient species being humans. This is in an alternate universe from our Earth; though it's similar, there are many differences.

History
Many years before the current time in Steven Universe, Gems came to Earth and established Kindergarten. The Rebellion was fought here and Earth became the home of the Crystal Gems.

There are several historical differences between Earth in the show and Earth in real life.
 * Delmarva is a state.
 * Kansas is a major hub of the movie industry.
 * The state of Pennsylvania is called "Keystone".
 * Major American cities include Charm City and Empire City.
 * Money looks different. Some coins have Gadsden-like snake symbols, or pictures of a woman resembling Pearl. $1 bills have images of an upward-pointing diamond on the left and a Gadsden-like snake symbol on the right.
 * Instead of the FBI, there is the Department of Justice: Federal Bureau. Their symbol has 12 stars instead of 13, and instead of a shield surrounded by laurels, there's a snake resembling the one from the Gadsden flag, accompanied by a waning crescent moon symbol.
 * Based on maps of the globe shown in the show, the geography of the Earth has changed.
 * The Floridian peninsula of North America appears to be completely missing.
 * Panama does not seem to connect to South America through Colombia.
 * A large island and two smaller islands can be seen off the Atlantic coast of South America.
 * The land area of South America consisting of Brazil is noticeably larger than in real life.
 * The shape of western Africa is significantly altered.

Trivia

 * Amethyst, unlike Pearl and Garnet, was made on Earth by the Kindergarten.
 * Rose Quartz rebelled against the Gem Homeworld in order to protect Earth.