Simplify the following text for a Grade 3 native English-speaking person.
Original: By value , gold is by far the most important mineral mined . In 2004 , 6800000 o of gold worth $ 2.84 billion were mined in Nevada , and the state accounted for 8.7 % of world gold production ( see Gold mining in Nevada ) .
Simplified: More gold is mined in Nevada than in any other state .