be careful with the white gold, most of it is plated with rhodium (a metal in the platinum family); white gold itself is dull, and this is done to make it shiny. I had a jeweller in the family, and got my original wedding band from him, many years ago. When he asked if I wanted it plated, I said no. I’m sure my face was a treat when I first saw it; it was immediately plated! This method of cleaning might remove the plating eventually. I’d check with a jeweller before doing it too often.
I just went on your site this morning because I had a lot of jewellery to cleaned. I found that all glitter like gold. The other things are glittering as well. I always used the commercial brand but it ruined quite a few things.I Used all the things that were called for and it worked out fine. If you have a high piece I just put it in a smaller container.