Carrying for Personnal Use Gold Amount to Germany

Hello
Hope you are doing well
I am kindly asking for something hope I will receive it answer.
As you know my wife is German citizen and since 2014 she is living here in Afghanistan , now she planne to go to back Germany so my specific questions here is that:
1-As a current and updated rule how much gold can a women carry with hereself to the Germany for here personal use with free of taxes.
Or
With how much value can a women carry gold or jewelry from Asian countries to German for their personal uses with free of tax.