Jade Care and Cleaning Guide

Hardness and toughness
Gem and mineral hardness is measured on the Mohs scale. The numbers are based on the relative ease or difficulty with which one mineral can be scratched by another
 
Jadeite is 6.5 to 7 and nephrite is 6 to 6.5 on the Mohs hardness scale, so some care should be taken to avoid scratches. However, both of these gemstones have exceptional toughness and are very resistant to breaking or chipping.

Stability
Heat from a jeweler’s torch can harm jade. Jade is stable to light, and it can be affected by warm acids.
 
Cleaning
Ultrasonic cleaners and steam cleaners are safe for untreated jade. But jade might be treated by dyeing, bleaching and impregnation, coatings, or heat treatment, so warm, soapy water is always a safe choice.
 
Reference:
1)      GIA Edu –encyclopedia. Jade Care and Cleaning Guide- Retrieved December 22, 2016 from https://www.gia.edu/jade-care-cleaning