Only with the fake ones for sale cheap for "jewelry cleaning", that don't actually work as US cleaners (they buzz and that agitates the solution, from my experience many years ago). You're taking a huge risk putting gems, even diamonds, in an ultrasonic cleaner that actually works.
Millions of articles about this. For example: https://www.jewelrynotes.com/what-jewelry-you-should-not-put-in-an-ultrasonic-cleaner/
Mine also blew the plating off an eyeglass frame. I don't do that anymore; the glasses cost a lot more than the US cleaner... I can only imagine the horror at destroying a diamond worth "three months salary" or whatever. Never mind pearls, opals, emeralds, rubies-- which are very likely to be damaged by a working US.
