A Quality stone: The stones is less of sparkling & brilliance. (Use the poor rough to make, The height/thickness of some stones are not reach the standard height of a diamond cut stone. And the Girdle of stone is thin & thick, not symmetrical. So, some of stones looks Cloudy.
2A Quality stones: The sparkling & brilliance is better than A Quality, As the cutting & faceting is better.
3A Quality stones: Use the better rough to make,Good cutting & faceting, calibrated in sizes & height, with symmetrical Girdle in general, Therefore, The sparkling & brilliance of stones are better than A & AA Quality.
AA: 市场上说的正统货 （压水面的-台面没有抛光的）
AAA: 市场上说的统上货 （光台面的-台面抛光的）
Sorry, the Nano green and topaz colors doesn’t have A and 2A quality. Neither of CZ Green or Aqua blue.
As the cost of rough are much higher than regular colors, will make these premium color stones in 3A high quality.