i dont know it...lolz
crop cultivation
Its a thing that you do in science olypiad where u take a powder and try to figure out what kind of powder it is
Take it to a jeweler, he'll test it for you to see, first, if it is even real gold, if it is, he'll tell you how much it's worth. Then you can either sell it to him or you can sell it at an auction or you can donate it to a museum of history or similar!