As for the first photo, this definitely looks silvery-promising... I wish I could inspect it with a little more detail - do you have some higher resolution shots of these leftovers perhaps?
And as for the second pic - do you mean to say these are gold particles? It is hard for me to notice a glitter on them, but this might be due to lighting.
By the way - are you a precious metal collector? Or doing it as a hobby?
RE: How to Clean Silver Jewelry and Restore Its Shine 💍