Natural AAA emeralds are rich green, moderately to slightly included, and they exhibit very high brilliance.
AAA grade gemstones beads are usually more expensive, higher quality, and near-perfect. These gemstone beads are not usually color-enhanced.
Natural AA is the second-best category for gemstones. Natural AA emeralds are medium green and may include moderate inclusions. AA emeralds account for 20-30% of all gemstones.
A, this category accounts for 50 to 75% of all emeralds. Natural A emeralds are dark green, heavily included, and opaque. They are still good, but they are considered to be of a lower quality. These emeralds could have eye-visible black crystal inclusions.