The reason why the turquoise powder is lost by glue filling may be that the glue or dye used is of poor quality or the process is incorrect. In the process of glue filling dyeing, if the viscosity of glue is not strong enough, or the dye can not be firmly attached to turquoise, the dyed layer will easily fall off.

In addition, the powder loss of dyed turquoise may also be caused by long-term wear. If it is often polished or worn, the dyed layer of turquoise may gradually wear away and eventually lose powder.

In order to prevent the turquoise dyed by glue from falling off, the following measures can be taken:

1. Choose good quality glue and dye to ensure strong adhesiveness and firmness, and reduce the possibility of powder dropping.

2. In the dyeing process, follow the correct process steps to ensure that glue and dye can be evenly coated on turquoise and firmly attached.

3. Pay attention to avoid excessive polishing or wearing for a long time to reduce the wear of the dyed layer.

If the above measures still can't solve the powder problem, it is recommended to consult a professional jewelry processor or an experienced jeweler for their advice and help.