Just like Diamonds, there are a number ofQuality Levels, & there are a range of Price Points for these beautiful look-a-likes. CZ stones are graded1A orA+ (Low Grade ), 2A or AA+, 3A or AAA+ (Middle Grade ), 4A or AAAA+, 5A or AAAAA+ (High Grade ), 6A or AAAAAA+ (The World’s Highest Quality CZ’s ).