Simplify the following text for a Grade 12 native English-speaking person.
Original: Places named after the stone include Marblehead , Ohio ; Marble Arch , London ; the Sea of Marmara ; India 's Marble Rocks ; and the towns of Marble , Minnesota ; Marble , Colorado ; and Marble Hill , Manhattan , New York .
Simplified: Places named after the stone include Marble Arch , London ; the Sea of Marmara ; India 's Marble Rocks ; and the towns of Marble , Minnesota ; Marble , Colorado ; and Marble Hill , Manhattan , New York .