Generally speaking, 6 mi, 8 mi and 10 mi are not enough, while the sizes of "Ka 6", "Ka 8" and "Ka 10" refer to full-size beads with diameters of 6 mm, 8 mm and10 mm.
Beads with a diameter of 8 mm are 0.8 cm.
Generally, the cross-sectional diameter of a gem is cut under the premise of ensuring the weight, so its diameter is not fixed. The ratio of emeralds to water is 2.63-2.9 1, and that of rubies to water is 3.96-4.05, which means that rubies are heavier than emeralds under the same volume.
6mm in diameter is 0.6 cm and 8 mm in diameter is 0.8 cm.
The size of a pearl is generally expressed by its diameter in millimeters (mm). The diameter of small pearls can be less than 1 mm, and the diameter of big Nanyang pearls can be more than 20 mm The bigger the pearl, the more difficult it is to cultivate, the rarer the quantity, and the price often increases exponentially.
It should be noted that there will be some deviations between the size seen by consumers and the data given by the industry. The actual size of general standard 8-9mm is 7.5-8.5, and that of standard 9- 10mm is 8.5-9.5,10-1,12.