味辛咸，寒，无毒。主周痹风湿，肢节中痛，不可持物，洗洗酸痛，除大热，烦满及
耳聋。养肾脏，强骨气，益精除烦，通关节，消痈肿鼠 ，颈核喉痛，小儿惊痫。《药性论》
云∶臣，味咸，有小毒。能补男子肾虚，风虚，身强，腰中不利。陈脏器云∶味咸，温，无
毒。主补绝伤，益阳道，止小便白数，治腰脚，去疮 ，长肌肤，令人有子。日华子云∶味
甘涩，平。治眼昏，筋骨羸弱，补五劳七伤，除烦躁，消肿毒，小儿误吞铁针等。《外台秘
要》云∶疗疔肿。取磁石为粉，酽醋和封之，立拔根出，瘥，神妙。《鬼遗方》∶治金疮肠出
欲入之，磁石、滑石各三两为末，以白米饮调方寸匕服，日再服。《丹房镜源》云∶服食
可长久，多服必有大患。《青霞子》云∶磁石毛治肾之疾。柴胡为之使。杀铁毒。恶∶牡
莽草。畏∶黄石脂。
味咸，温，无毒。主大人小儿惊痫，女子绝孕，少腹冷痛，少精身重，服之令人有子
一名玄水石，一名处石。生太山之阳，山阴有铜，铜者雌，玄石者雄。恶∶松枝、柏实、菌
桂。一云∶磁石中有细孔，中黄赤色，好者能连十针，其无孔光泽纯黑者，玄石也，不能悬
针也。
一名寒水石。味辛甘，寒、大寒、无毒。主身热，腹中积聚邪气，皮中如火烧，烦满，
水饮之。除时气热盛，五脏伏热，胃中热，烦满，口渴，水肿，小腹痹。《药性论》云
压丹石毒风，去心烦渴闷，解伤寒复劳。一云∶治风热，心躁，口干，狂言，浑身壮热及中
诸毒。解∶巴豆毒。畏∶地榆。采∶无时。
【磁石】
味辛、咸，性寒，无毒。主治周身痹证及风湿之邪，肢体关节疼痛，不能持物，身体瑟瑟酸痛，清除大热，消除烦闷胀满以及耳聋。滋养肾脏，强健骨骼与气机，补益精髓，消除烦躁，疏通关节，消散痈肿、鼠瘰（淋巴结核）、颈部肿块及咽喉疼痛，治疗小儿惊风抽搐。《药性论》记载：作为臣药，味咸，有小毒。能补益男子肾虚，改善因风虚导致的身体僵硬，缓解腰部活动不利。陈藏器记载：味咸，性温，无毒。主治补益绝伤（严重创伤或虚损），增益阳气之道，止住小便频数且色白，治疗腰脚疾病，去除疮疡疤痕，促进肌肤生长，使人能够生育。日华子记载：味甘、涩，性平。治疗眼目昏花，筋骨瘦弱，补益五劳七伤，消除烦躁，消肿解毒，治疗小儿误吞铁针等异物。《外台秘要》记载：治疗疔疮肿毒。将磁石研成粉末，用浓醋调和后敷贴患处，可立即拔出毒根，痊愈，效果神妙。《鬼遗方》记载：治疗金创导致肠管脱出欲回纳的情况，取磁石、滑石各三两研为末，用白米汤调服一方寸匕，每日服用两次。《丹房镜源》记载：服用可长久延年，但多服必然带来大祸患。《青霞子》记载：磁石的毛刺用于治疗肾脏疾病。柴胡为其引经药（使药）。能解除铁毒。禁忌：厌恶牡莽草。畏惧黄石脂。
【玄石】
味咸，性温，无毒。主治大人和小儿的惊风抽搐，女子的不孕症，少腹冷痛，精液稀少且身体沉重，服用后可使人获得子嗣。又名玄水石，又名处石。产于泰山的南面。山阴面有铜矿，铜被视为雌，玄石被视为雄。禁忌：厌恶松枝、柏实、菌桂。另一种说法认为：磁石中有细孔，中间呈黄赤色，好的磁石能连吸十枚针；那些没有孔洞、光泽纯黑的，是玄石，不能悬挂针具。
【凝水石】
又名寒水石。味辛、甘，性寒、大寒，无毒。主治身体发热，腹中积聚的邪气，皮肤中如火烧般感觉，烦闷胀满，需饮水缓解。清除时行疫病的热盛，五脏潜伏的热邪，胃中热邪，烦闷胀满，口渴，水肿，小腹痹痛。《药性论》记载：压制丹石类药物引发的毒风和不适，去除心烦口渴闷乱，解除伤寒病愈后的复发劳热。另一种说法认为：治疗风热，心躁动，口干，胡言乱语，全身高热以及中毒诸症。解毒：巴豆毒。畏惧：地榆。采集：随时可采。
[Cishi, Magnetitum]
Pungent and salty in flavor, cold in nature, non-toxic. It primarily treats generalized bi-syndrome (painful obstruction syndrome) caused by wind-dampness, pain in the limbs and joints, inability to hold objects, a sensation of shivering soreness, clears excessive heat, relieves fullness and irritability, and cures deafness. It nourishes the Kidney, strengthens bones and Qi, benefits essence, eliminates vexation, unblocks joint passages, dissipates carbuncles and scrofula (tuberculous lymphadenitis), neck masses, and throat pain, and treats pediatric convulsions. *Yaoxing Lun* states: As a minister herb, it is salty with slight toxicity. It can tonify Kidney deficiency in men, address wind-deficiency leading to stiffness, and alleviate lumbar immobility. Chen Zangqi states: Salty, warm, non-toxic. It primarily treats severe injuries or deficiencies, benefits the Yang pathway, stops frequent white urination, treats waist and foot ailments, removes scar tissue from sores, promotes skin growth, and aids fertility. Ri Huazi states: Sweet and astringent, neutral. It treats dim vision, emaciation of sinews and bones, tonifies five exhaustions and seven injuries, eliminates restlessness, reduces swelling and detoxifies, and treats conditions such as children accidentally swallowing iron needles. *Waitai Miyao* states: It treats ding-sores (carbuncles). Grind Cishi into powder, mix with strong vinegar, apply externally; this will immediately draw out the root of the toxin, resulting in cure, which is miraculous. *Guiyi Fang*: Treats abdominal evisceration due to metallic wounds. Take 3 liang each of Cishi and Huashi (Talcum), grind into powder, take one fangcunbi (a measure for powder) mixed with rice water, twice daily. *Danfang Jingyuan* states: Consumption may prolong life, but excessive intake will surely cause great disaster. *Qingxiazi* states: The bristles of Cishi treat Kidney diseases. Chaihu (Bupleuri Radix) acts as its guiding herb (shi). It neutralizes iron toxicity. Antagonisms: Dislikes Mumaocao. Fears Huangshizhi.
[Xuanshi, Magnetitum Nigrum]
Salty, warm, non-toxic. It primarily treats convulsions in adults and children, female sterility, cold pain in the lower abdomen, scanty sperm accompanied by heaviness of the body, and its consumption enables one to have offspring. Also known as Xuanshui Shi or Chushi. It grows on the south slope of Mount Tai. On the north slope of the mountain, there is copper ore; copper is considered female (yin), and Xuanshi is considered male (yang). Antagonisms: Dislikes Songzhi (Pine branch), Baishi (Cupressus fruit), and Jungui (Cinnamomum cassia bark). Another account states: Cishi contains fine pores with yellowish-red centers; high-quality Cishi can suspend ten needles. Those without pores, possessing pure black luster, are Xuanshi, which cannot suspend needles.
[Ningshui Shi, Gypsum Fibrosum]
Also known as Hanshui Shi. Pungent and sweet, cold and extremely cold, non-toxic. It primarily treats fever, accumulation of pathogenic qi in the abdomen, a burning sensation in the skin, vexation and fullness requiring drinking water. It clears excess heat from seasonal epidemics, latent heat in the five zang organs, stomach heat, vexation and fullness, thirst, edema, and bi-pain in the lower abdomen. *Yaoxing Lun* states: It suppresses wind and discomfort caused by Danchi (mineral pill) toxicity, removes mental restlessness, thirst, and stuffiness, and resolves recurrent fatigue after typhoid recovery. Another account states: It treats wind-heat, cardiac irritability, dry mouth, delirious speech, generalized high fever, and various poisonings. Detoxification: Resolves Bidou (Croton seed) toxicity. Fears Diyü (Sanguisorbae Radix). Collection: Anytime.