The difference between petty theft and grand theft in the State of California depends on the value of the stolen merchandise. Generally, when someone steals something valued at or below $950 it is charged as a misdemeanor-level petty theft crime. When the cost is over $950, grand theft (which can be charged as either a misdemeanor or a felony) is usually charged. When it comes to theft crimes in California, they all have similar elements: Property existed owned by someone else The sus...