味酸，寒，无毒。主寒热，泄痢，白沃，阴蚀，恶疮，目痛，坚骨齿，除固热在骨髓
，去鼻中息肉。炼饵服之，轻身、不老、增年。歧伯云∶久服伤人骨。能使铁为铜。一名羽
KT，一名羽泽。生河西山谷，及陇西武都、石门，采无时。
甘草为之使，恶牡蛎。今出益州北部西川，从河西来。色青白，生者名马齿矾。已炼成
绝白，蜀人又以当硝石名白
矾。其黄黑者名鸡屎矾，不入药，惟堪镀作以合熟铜。投苦酒中，涂
内质不变。《仙经》单饵之，
丹方亦用。俗中合药，皆先火熬令沸燥，以疗齿痛，多即坏齿，是伤骨之证，而去坚骨齿，
诚为疑也。
〔谨案〕矾石有五
种∶青矾、白矾、黄矾、黑矾、绛矾，然白矾多入药用；青黑二矾，疗疳及诸疮；黄矾亦疗
疮生肉，兼染皮用之；其绛
矾本来绿色，新出窟未见风者，正如琉璃，陶及今人谓之石胆，烧之赤色，故名绛矾矣，出
瓜州。
味甘，寒、大寒，无毒。主身热、泄 ，女子乳难，癃闭，利小便，荡胃中积聚寒热
，益精气，通九窍六腑津液，去留结，止渴，令人利中。久服轻身，耐饥，长年。一名液
石
无时。
石苇为之使，恶曾青。滑石色正白，《仙经》用之以为泥。又有冷石，小青黄，性并冷
利，
亦能熨油污衣物。今出湘州、始安郡诸处。初取软如泥，久渐坚强，人多以作冢中明器物
，并散热人用之，不正入方药。赭阳县先属南阳，汉哀帝置，明《本经》所注郡县，必是后
汉时也。掖县属青州东莱，卷县属司州荣阳。
〔谨案〕此石所在皆有。岭南始安出者，白如
凝脂，极软滑。其出掖县者，理粗质青白黑点，惟可为器，不堪入药。齐州南山神通寺南谷
亦大有，色青白不佳，至于滑腻，犹胜掖县者。
矾石：
味酸，性寒，无毒。主治寒热往来、泄泻痢疾、白带过多（白沃）、阴部腐蚀溃疡、恶疮、目痛，能坚固骨骼牙齿，清除骨髓中的顽固热邪，去除鼻中息肉。经过炼制后服用，可使人身体轻盈、延缓衰老、增加寿命。岐伯说：长期服用会损伤人的骨骼。能使铁变成铜。又名羽KT，又名羽泽。产于河西山谷，以及陇西武都、石门等地，采集没有固定时间。以甘草为引经药，畏忌牡蛎。现在出产于益州北部西川，是从河西运来的。颜色青白，未炼制的称为马齿矾。已经炼制完成的呈纯白色，蜀地人又把它当作硝石，称为白矾。其中黄黑色的称为鸡屎矾，不入药，只可用于镀金制作，配合熟铜使用。投入醋（苦酒）中，其内部质地不变。《仙经》中单用此物服用，丹方中也常用。民间配药时，通常先用火熬煮至沸腾干燥，用来治疗牙痛，但用量过多会损坏牙齿，这是伤骨的证据，这与它“坚固骨骼牙齿”的功效确实存在矛盾。
〔谨案〕：矾石有五种：青矾、白矾、黄矾、黑矾、绛矾，然而白矾多用于入药；青矾和黑矾，用于治疗疳积和各种疮疡；黄矾也用于治疗疮疡生肌，兼作染色皮革之用；那绛矾本来是绿色的，刚从矿洞出来未见风气的，就像琉璃一样，陶工和今人称之为石胆，烧制后变为赤色，所以叫绛矾，出产于瓜州。
滑石：
味甘，性寒、大寒，无毒。主治身体发热、泄泻、女子乳汁不通、小便淋漓不畅或闭塞，通利小便，清除胃中积聚的寒热邪气，补益精气，通畅九窍和六腑的津液，去除停留的结滞，止渴，使人肠胃通畅。长期服用可使人身体轻盈，耐饥，延年益寿。又名液石。采集没有固定时间。
以石苇为引经药，畏忌曾青。滑石颜色正白，《仙经》用它来做泥。又有冷石，颜色小青黄，性质也都寒冷滑利，也能用来熨烫油污衣物。现在出产于湘州、始安郡各地。刚开采时软如泥土，时间久了逐渐变坚硬，人们多用来制作墓穴中的照明器物，并作为散热材料给人使用，并不正式进入方药之中。赭阳县先前属于南阳郡，汉哀帝时设置，明《本经》所注释的郡县，必定是后汉时期的情况。掖县属于青州东莱郡，卷县属于司州荥阳郡。
〔谨案〕：这种石头各地都有。岭南始安出产的，白得像凝固的油脂，极其柔软滑腻。出产于掖县的，纹理粗糙，质地青白带有黑点，只可用来制作器物，不堪入药。齐州南山神通寺南谷也有大量出产，颜色青白不佳，至于滑腻程度，还胜过掖县出产的。
Alum Stone (Fan Shi):
Taste: sour; Nature: cold; Toxicity: non-toxic. It primarily treats alternating chills and fever, diarrhea and dysentery, leukorrhea (excessive white vaginal discharge), erosion and ulceration of the genitalia, malignant sores, eye pain, strengthens bones and teeth, eliminates persistent heat in the bone marrow, and removes nasal polyps. After refining and taking it as a pill or powder, it can make the body light, prevent aging, and prolong life. Qibo stated: Long-term use damages human bones. It can transform iron into copper. Also known as Yutai, also known as Yuze. It grows in the valleys of Hexi, as well as in Wudu and Shimen of Longxi. It can be harvested at any time. Licorice Root (Gancao) serves as its guide drug; it is incompatible with Oyster Shell (Muli). Currently, it is produced in the northern part of Yizhou (Xichuan), imported from Hexi. Its color is bluish-white; the unrefined form is called Machi Fan (Horse-tooth Alum). The fully refined form is pure white; people in Shu also refer to it as Natrii Sulfas (Xiaoshi) and call it Bai Fan (White Alum). The yellowish-black variety is called Jishi Fan (Chicken-dung Alum); it is not used in medicine but is suitable for plating and alloying with annealed copper. When placed in vinegar (Ku Jiu), its internal substance remains unchanged. The *Immortal Classic* mentions using it alone as an elixir, and it is also used in alchemical formulas. In folk medicine preparation, it is usually boiled over fire until boiling and dry to treat toothache; however, excessive use damages teeth, which is evidence of bone damage, contradicting its claim to "strengthen bones and teeth," thus raising doubts.
[Editor's Note]: There are five types of Alum Stone: Qing Fan (Green Alum), Bai Fan (White Alum), Huang Fan (Yellow Alum), Hei Fan (Black Alum), and Jiang Fan (Crimson Alum). However, Bai Fan is mostly used in medicine; Qing Fan and Hei Fan are used to treat infantile malnutrition (Gan accumulation) and various sores; Huang Fan is also used to treat sores and promote flesh growth, and is additionally used for dyeing leather; Jiang Fan is originally green; when newly mined and not exposed to air, it resembles glass. Potters and modern people call it Shidan (Stone Gall); after calcination, it turns crimson, hence the name Jiang Fan. It is produced in Guazhou.
Talc (Hua Shi):
Taste: sweet; Nature: cold, very cold; Toxicity: non-toxic. It primarily treats body heat, diarrhea, difficulty in lactation in women, strangury and urinary retention, promotes urination, clears accumulated cold and heat in the stomach, benefits essence and qi, unblocks the nine orifices and the fluid metabolism of the six fu organs, removes stagnation and accumulation, relieves thirst, and facilitates bowel movement. Long-term use makes the body light, increases resistance to hunger, and prolongs life. Also known as Yeshi. It can be harvested at any time.
Leafy Fern Herb (Shiwei) serves as its guide drug; it is incompatible with Azurite (Zengqing). Talc is pure white; the *Immortal Classic* uses it to make clay. There is also a "cold stone" with a bluish-yellow color, which is also cold and slippery in nature, and can be used to iron oily clothes. Currently, it is produced in Xiangzhou, Shian Commandery, and other places. When first extracted, it is soft like mud; over time, it gradually becomes hard. People often use it to make lighting vessels for tombs and for cooling purposes, but it is not formally included in medical prescriptions. Zhe County previously belonged to Nanyang Commandery and was established during the reign of Emperor Ai of Han. The commanderies and counties annotated in the *Classic of Materia Medica* (*Benjing*) must reflect the administrative divisions of the Later Han Dynasty. Yexian belonged to Donglai Commandery in Qingzhou; Juan County belonged to Rongyang in Sizhou.
[Editor's Note]: This stone is available everywhere. The variety produced in Shian in Lingnan is white like congealed fat and extremely soft and slippery. The variety from Yexian has a coarse texture, is bluish-white with black spots, and is only suitable for making vessels, not for medicinal use. There is also a large production in the south valley of Shentong Temple in the southern mountains of Qizhou; its color is poor bluish-white, but its slipperiness still surpasses that of the Yexian variety.