Hi Mary, The SpeedBrite Ionic cleaner advertises itself (and its
liquid solution) as being safe for all gems, including emeralds, opal
and pearl. An ultrasonic is more aggressive, in my experience, and
especially depending on the solution, and be very bad for some stones.
In certain situations the risk from the ultrasonic is due to the
energy waves, in other cases possibly due to harsh chemicals.
I have the best of both worlds… a SpeedBrite that mounts on the
side of, and works with my ultrasonic. I can use one, the other, or
both actions at any time. I just have to remember not to use the
speedbrite after applying a patina because it lifts it right off
If I had to choose one or the other? Tough question… probably I’d
go with the ultrasonic and resort to hand cleaning sensitive pieces
like I used to do.
Hope this helps,
Sebaste Studio and
Carolina Artisans’ Gallery
Charlotte, NC (USA)