What kind of material is good for the seal?

This is the first time that China literati printed since Wang Mian began to treat printing with Elaeagnus Elaeagnus in Ming Dynasty. Wen Peng carved with Qingtian stone and became a great master. In short, the carving materials are basically pyrophyllite printing materials. Common ones are: Qingtian stone (Qingtian knife has the most feeling! Flying stone chips feel the best. But the real Qingtian top grade frozen stone has disappeared. Occasionally, I found an amazingly expensive one), Chang Fossil (the knife is slightly inferior to Qingtian Stone, which is a bit sticky, but it is also a famous printing material, and the common printing material is more beautiful than Qingtian's), Shoushan Stone (common printing material, easy to use) and Balin Stone (made in Inner Mongolia, right? I haven't used it, but it's available online, which is more expensive), Xiaoshan Stone (I bought a batch of Xiaoshan Red a few days ago, which is quite beautiful, but it feels like a knife, so I don't think we should choose seal cutting) and so on.

In addition, there are many printing materials: ivory, agate, jade, crystal, copper, silver, gold and glass can be printed, but they need special tools and means to carve, which are generally not for fun. The author once carved a jade seal for a friend, which took a whole morning and destroyed two carving knives to complete.