Hi guys, I'm looking at a JNAT for sale, the stamp says something very similar to "正水山合纸"
I can read some chinese so I can recognise 正水山 "Zheng Shui Shan" (genuine water mountain ?) and the fourth character is "he" 合, the fifth character has no chinese equivalent so I can't write it exactly but looks close to 纸 zhi with a different prefix (first half of the character).

Lol. can someone help me out here? I'm thinking this might be just a generic kinda stamp on stones and it will not tell me which mine it's from but maybe someone knows.