太陰玄精
太陰玄精
出河東解縣鹽池中，鹽根是也。近水採之，形體如玉質，又如龜甲。黑重者不堪，黄白明淨者爲上。此亦制汞化之作粉矣。對試比鹽州稍最，故知如此鹽州者爲上。
End of chapter
Text and scans: Shidian Guji (Peking University – ByteDance open ancient texts). Edition details are given per book. Shidian Guji
金石簿五九數訣
太陰玄精
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