Colored crystal, that is, colored crystal.
Abacus beads
The crystal is still intact.
Permeability is average
More absorbent cotton
The color is brighter.
The colored crystal products of abacus beads are rare in the market and difficult to find. You can ask the jewelry store attendant to help you find a way to lengthen it, but it is more difficult to find beads.
for reference only
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Good luck!