Like all gemstones, Ammolite is graded for quality. Based on the multiplicity and vibrancy of the colour in the stone, Ammolite can be graded as ‘standard’ (one or more brilliant colour), ‘A’ (two or more colour with good brilliance), ‘AA’ (at least 3 brilliant colours), and ‘AAA’ (3 to 5 brilliant colours with no matrix lines visible). The rarity of ‘AA’ and ‘AAA’ Ammolite stones is akin to that of a flawless diamond. Read more about Ammolite here.