I have a rope.

I didn't even see it grow.

What we commonly call "hair" is actually a mineral. Usually, white crystal is the main crystal. Generally speaking, the longer the hair crystal is worn, the brighter the crystal will be, but the hair will not increase. If it becomes more, it is probably a wig crystal. Synthetic crystals are used and dyes are injected into them. After a long time, it will fade and the "hair" will spread out. Occasionally there will be dull hair crystals, which will happen after a long time. You need to see the real thing to have an accurate appraisal.