一名 铁石，一名吸铁石，一名玄石。
柴胡为之使。畏黄石脂。恶牡丹、莽草。伏丹砂。养水银。去铜晕。杀铁毒。消金。
辛、咸，平。入足少阴经。坠炎上之火以定志，引肺金之气以入肾。（水得金而自清，火不
攻而自伏。）除烦闷，逐
惊痫，聪耳明目。得朱砂、神曲，交心肾，治目昏内障。（磁石使精水不外遗，朱砂使邪火
不上侵。）配人参，治阳事不
起。佐熟地、萸肉，治耳聋。（相火不上，则气清而聪。）和面糊调涂囟上，治大肠脱肛。（入
后洗去。）
地榆汁煮，火 醋淬用。入肠恐致后患，纱包入药煎，但取其气为妥。
诸石有毒，不宜久用。独磁石性禀冲和，常服亦可。
一名土朱
干姜为之使。畏天雄、附子。
苦，寒。入手足厥阴经血分。镇包络之气，除血脉之热。疗崩带，止反胃吐衄，治惊痫
疳疾。得生地汁，治吐血、
衄血、下血。得冬瓜仁汤调下，治慢惊风。（泻后不乳，目黄如金。）佐半夏，蠲痰饮。 ，
醋淬七次，研，水飞过用。
气不足、津液燥者，禁用。
牡丹为之使。制五金三黄。甘，寒。重涩。入手足阳明经血分。固下焦。治烦满、症瘕、
肠泄、下痢，四肢不仁，
骨节疼痛，久远痔 。配赤石脂，治大肠咳嗽。（嗽即遗矢。）配赤石脂、牡蛎粉、乌贼骨、
伏龙
丹皮同煮，晒干用，或火 醋淬用。
【磁石】
别名：铁石，吸铁石，玄石。
引经药（使药）：柴胡。
禁忌：畏黄石脂。厌恶牡丹、莽草。能伏制丹砂。滋养水银。去除铜锈。杀灭铁毒。溶解黄金。
性味归经：辛、咸，平。入足少阴肾经。
功效主治：重镇上浮之虚火以安定神志，引导肺金之气下行入肾。（原理：水得金气则自清，火不攻伐则自伏。）消除烦闷，驱逐惊痫，使耳聪目明。与朱砂、神曲配伍，交通心肾，治疗内障目昏。（原理：磁石使精水不外泄，朱砂使邪火不上侵。）与人参配伍，治疗阳痿不起。佐以熟地黄、山茱萸，治疗耳聋。（原理：相火不上炎，则清气上升而听觉灵敏。）与面糊调和涂敷囟门处，治疗大肠脱肛。（用药后洗去。）
炮制方法：用地榆汁煮，或用火煅醋淬后使用。若担心入肠造成后患，可用纱布袋包煎，只取其气味即可。
注意事项：诸金石类药物多有毒性，不宜长期服用。唯独磁石性质冲和，常服亦可。
【代赭石】
别名：土朱。
引经药（使药）：干姜。
禁忌：畏天雄、附子。
性味归经：苦，寒。入手足厥阴肝经血分。
功效主治：镇摄心包络之气，清除血脉之热。治疗崩漏带下，止住反胃吐血衄血，治疗惊痫疳疾。与生地黄汁配伍，治疗吐血、衄血、便血。用冬瓜仁汤调服，治疗慢惊风。（症状：泻痢后不吃奶，眼睛黄如金色。）佐以半夏，祛除痰饮。
炮制方法：用火煅醋淬七次，研细，用水飞法处理。
禁忌：气不足、津液干燥者禁用。
【禹余粮】
引经药（使药）：牡丹。
功能：制约五金及三黄（通常指黄连、黄芩、黄柏等）。
性味归经：甘，寒。质地沉重且涩。入手足阳明经血分。
功效主治：固摄下焦。治疗烦满、症瘕积聚、肠泄、下痢、四肢麻木不仁、骨节疼痛、久治不愈的痔疮。与赤石脂配伍，治疗大肠咳嗽。（解释：咳嗽即伴随遗矢失禁。）与赤石脂、牡蛎粉、乌贼骨、伏龙肝配伍。
炮制方法：与丹皮同煮，晒干使用，或火煅醋淬后使用。
[Cishi (Magnetite)]
Aliases: Tieshi (Iron Stone), Xitie Shi (Lodestone), Xuanshi.
Guiding Herb (Shi): Chaihu (Bupleuri Radix).
Contraindications: Feared by Huangshizhi (Yellow Earth Resin). Averse to Mudanpi (Moutan Cortex) and Mangcao (Acorus calamus or similar aromatic herb). Can subdue Dansha (Cinnabar). Nourishes Mercury. Removes copper rust. Kills iron toxicity. Dissolves gold.
Properties and Meridians: Acrid, Salty, Neutral. Enters the Foot-Shaoyin Kidney Meridian.
Actions and Indications: Descends floating hyperactive fire to stabilize the mind; guides Lung Metal Qi to enter the Kidney. (Principle: Water becomes clear when aided by Metal; Fire settles naturally without attack.) Eliminates vexation and oppression; expels fright and epilepsy; sharpens hearing and vision. Combined with Zhusha (Cinnabar) and Shenqu (Massa Medicata Fermentata), it communicates between Heart and Kidney, treating internal clouding of the eyes. (Principle: Cishi prevents essence from leaking outward; Zhusha prevents pathogenic fire from invading upward.) Paired with Renshen (Ginseng Radix et Rhizoma), treats impotence. Assisted by Shudihuang (Prepared Rehmanniae Radix) and Yurou (Corni Fructus), treats deafness. (Principle: When Ministerial Fire does not flare up, clear Qi ascends, resulting in acute hearing.) Mixed with flour paste and applied to the fontanelle, treats rectal prolapse. (Wash off after use.)
Processing: Decoct in Suyu juice (Sanguisorbae Radix juice), or calcine and quench in vinegar. To avoid potential adverse effects on the intestines, decoct in a gauze bag, extracting only the aroma is appropriate.
Note: Most mineral drugs are toxic and unsuitable for long-term use. Only Cishi has a mild and harmonious nature, suitable for regular use.
[Dai zheshi (Hematite)]
Alias: Tuzhu.
Guiding Herb (Shi): Jiangtan (Dried Ginger).
Contraindications: Feared by Tianxiong (Aconiti Lateralis Radix Preparata) and Fuzi (Aconiti Lateralis Radix Preparata).
Properties and Meridians: Bitter, Cold. Enters the Blood aspect of the Hand-Jueyin Pericardium and Foot-Jueyin Liver Meridians.
Actions and Indications: Calms the Qi of the Pericardium; clears heat from the blood vessels. Treats metrorrhagia and leukorrhea; stops regurgitation, hematemesis, and epistaxis; treats fright, epilepsy, and infantile malnutrition. Combined with Shengdihuang juice (Rehmanniae Radix fresh juice), treats hematemesis, epistaxis, and hematochezia. Administered with Dongguaren soup (Winter Melon Seed Decoction), treats slow convulsions. (Symptoms: Refusal to nurse after diarrhea, eyes yellow as gold.) Assisted by Banxia (Pinelliae Rhizoma), dispels phlegm-fluid retention.
Processing: Calcine seven times in vinegar, grind into powder, and process by water flotation.
Contraindications: Forbidden for those with Qi deficiency and dry fluids.
[Yuyuliang (Limonitum)]
Guiding Herb (Shi): Mudanpi (Moutan Cortex).
Function: Restricts the properties of "Five Metals" and "Three Yellows" (typically Huanglian, Huangqin, Huangbai).
Properties and Meridians: Sweet, Cold. Heavy and astringent. Enters the Blood aspect of the Hand-Yangming Large Intestine and Foot-Yangming Stomach Meridians.
Actions and Indications: Secures the Lower Jiao. Treats vexation and fullness, masses and accumulations, intestinal diarrhea, dysentery, numbness of the four limbs, joint pain, and chronic hemorrhoids. Paired with Chishizhi (Kaolin), treats "Large Intestine cough" (cough accompanied by involuntary defecation). Combined with Chishizhi, Muli (Ostrea Shell), Ougu (Sepiae Endoconcha), and Fulongdan (Long-stewed Earth), used together.
Processing: Decoct with Danpi (Moutan Cortex), sun-dry for use, or calcine and quench in vinegar.