What jewellery should I avoid putting in an ultrasonic cleaner?
There is very little you can't clean, but if you have any doubt we strongly recommend you contact the manufacturer of the particular item you want to clean first.
DO NOT clean precious stones without gaining approval from a jeweller first. Ultrasonic cleaning is not suitable for certain types of precious stones. Please use the table below as a guide only.
| Precious Stone | Ultrasonic Clean | Precious Stone | Ultrasonic Cleaning OK? | |
| Amber | No | Opal | No | |
| Amethyst | No | Pearls | No | |
| Aquamarine | No | Perdot | No | |
| Blue Topaz | No | Rose Quartz | No | |
| Citrine | No | Ruby | Yes | |
| Diamond | Yes | Sapphire | Yes | |
| Emerald | No | Smoky Quartz | No | |
| Garnet | Yes | Tanzanite | No | |
| Jade | No | Topaz | No | |
| Onyx | No | Tourmaline | No |