You should be talking about the cutting formula of gemstones. Now most of them can be bought in Shacheng, a 40G, which is estimated to be 1600G by the whole school. Maybe too many, and it seems very prestigious. Respect is ok. It seems to be Chatar's formula, and a small part of the formula was bought after the prestige worship of the major camps! Some are necessary. Do chin when you have time.