5
* 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 function. 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 negatively affected by heat, solvents, steam and ultrasonic
cleaners. Knowing whether your gem has been treated is the first 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
Platinum
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
