Jade does'nt Scratch but Serpentine does. This album shows pendants made of serpentine stone. I have seen similiar pieces listed on Ebay and other sites. Instead of labeling them Serpentine they are being represented as jade, old jade, tomb jade, China jade, and ancient chinese jade, when actually they are not jade at all. How to Test Jade in an Imperfect World. There are only two types of Jade that are considered real Jade. There is Jadeite which measures between 6.0 and 7.0 on the Mohs Sacale of hardness, and there is Nephrite jade which measures between 6.0 and 6.5 on the Mohs scale of hardness. Other materials, no matter how much they look like jade, are not jade unless they meet this hardness criteria. A pocket knife has a blade which measures approximately 5.0 on up to 5.5 on the mohs hardness scale, thus making the pocket knife an excellent tool for testing jade. A pocket knife with it's hardness factor of 5 - 5.5 simply can not scratch genuine jade with a hardness of 6.0 or harder. All of the pendants in this album are carved from Serpentine stone which is softer than jade and will scratch with a knife.