Lantian jet has a characteristic of attracting magnets. Lantian jade belongs to nephrite with Mohs hardness less than 7, which can't compete with other jadeites. If you scrape the glass with it, it will definitely hurt. Look at what you said above and the pictures. This is lantian jade. I'll teach you a little way to identify lantian jade. Lick the surface of lantian jade with your tongue, and you feel your tongue is astringent. This is real jade.