FYI (INFO) The jade cools quickly, if you warm it in your hand and then put it on the table and take it back, it will already be cold. Also a tip for checking, it is best to look at the stone through a light source and / or with a magnifying glass. See if there are any fine veins inside. If you can't see anything or if you observe mini bubbles, the stone may be fake. There is a lot of counterfeiting.