Jewelry laser welding question. (Also minor criticism of website)

I have been trying to find a way to email XTool to ask a polite question, but if you click the email option on the website it just presents you with a chatbot option or a phone call.

I don't really want to take up valuable phone time for a support request to ask my question since this is a pre-purchase question, I hope posters here can answer?

I plan to work with precious metals like gold and silver. None of those are supported by the laser welder. Is that an option, has it been tested, are there settings I can use, or is it no-go absolutely verboten not going to happen?