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* When Not Recommended, consult a jeweler prior to using the ultrasonic, steam and UV light features.
** Hard natural gemstones can be put into an ultrasonic cleaner provided that they have few
inclusions and have not been treated with heat or chemicals. Treated gemstones become more
vulnerable with using the ultrasonic funcon. Consult your Jeweler.
***UV light exposure is generally stable for most gemstones, but we recommend you consult
your jeweler.
IMPORTANT NOTE: Many colored gemstones are routinely treated to improve the appearance of
color and clarity. These treatments can be negavely aected by heat, solvents, steam and ultrasonic
cleaners. Knowing whether your gem has been treated is the rst step to knowing how to care for it.
Durability of Gemstones is based on the Mohs Scale
Mohs Scale: 1 – 10: 1 = weakest/ 10 = strongest
Mohs Scale Durability Scale
1-4 Fragile
5- 7 Moderate
8-10 Strong
GUIDELINE FOR PRECIOUS METAL CLEANING
Metal Durability Steam Ultrasonic UV light
Gold Strong Yes Yes Yes
Planum Strong Yes Yes Yes
Stainless Steel Strong Yes Yes Yes
Sterling Silver Strong Yes Yes Yes
Titanium Strong Yes Yes Yes
Tungsten Carbide Strong Yes Not Recommended* Yes
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