（宋《嘉 》）
【释名】磨刀石（藏器）、羊肝石（《纲目》）、砺石。
时珍曰∶《尚书》∶荆州厥贡砥砺。注云∶砥以细密为名，砺以粗 为称。俗称者为羊肝
石，因形色也。
弘景曰∶越砥，今细砺石也。出临平。
【气味】甘，无毒。
【主治】目盲，止痛，除热瘙（《别录》）。磨汁点目，除障翳。
烧赤投酒饮，破血瘕痛切（藏器）。砺石 【主治】破宿血，下石淋，除结瘕，伏鬼物
恶气，烧赤投酒中饮之。人言∶踏之患带下，未知所由（藏器）。
磨刀 （一名龙白泉粉）
【主治】敷 尿疮，有效（藏器）。涂瘰 结核（时珍）。
（《唐本草》）
【释名】 KT 石。
时珍曰∶姜石以形名。或作礓砾，邵伯温云∶天有至戾，地有至幽，石类得之则为礓砾
是也。俗作 KT 。
【集解】恭曰∶姜石所在有之，生土石间，状如姜。有五种∶以色白而烂不碜者良，齐
州历城东者好。采无时。
宗 曰∶所在皆有，须不见日色旋取，微白者佳。
【气味】咸，寒，无毒。
【主治】热豌豆疮，疔毒等肿（唐本）。
【附方】旧二，新二。
疔疮肿痛∶白姜石末，和鸡子清敷之，干即易，疗自出，神效。（崔氏方）乳痈肿大如
碗肿痛∶方同上。（《外台秘要》）
产后胀冲气噎∶ KT 石、代赭石等分，为末，醋糊丸梧子大。每服三、五十丸，醋
汤下。（洁古《保命集》）
通身水肿∶姜石烧赤，纳黑牛尿中，热服，日饮一升。（《千金方》）
(Sourced from the Song Dynasty "Jia You Ben Cao")
[Names] Whetstone (named by Chen Zangqi), Sheep Liver Stone (named in "Ben Cao Gang Mu"), Li Shi.
Li Shizhen stated: The "Book of Documents" records that Jingzhou offered Di and Li as tribute. The annotation explains: Di is named for its fine density, while Li is known for its coarseness. It is commonly called Sheep Liver Stone due to its color and shape resembling sheep liver.
Tao Hongjing stated: Yue Di refers to the current fine whetstone. It is produced in Linping.
[Flavor and Toxicity] Sweet flavor, non-toxic.
[Indications] Treats blindness, relieves pain, and eliminates heat-induced itching (from "Ming Yi Bie Lu"). Grinding into juice and applying to the eyes removes cataracts and ocular opacities.
Heated until red-hot and then ingested with wine, it breaks blood masses causing severe pain (Chen Zangqi). Li Shi [Indications] Breaks old blood stasis, expels stones in strangury, eliminates nodules and accumulations, dispels latent evil qi. Heated until red-hot and ingested with wine. People say that stepping on it causes leukorrhea, though the reason is unknown (Chen Zangqi).
Whetstone (also known as Long Bai Quan Powder)
[Indications] Applied externally to treat urethral ulcers, effective (Chen Zangqi). Applied topically to treat scrofula and tubercles (Li Shizhen).
(From "Tang Ben Cao")
[Names] Jiang Shi.
Li Shizhen stated: Jiang Shi is named after its shape. Sometimes written as "Jiang Li". Shao Bowen said: Heaven has extreme rebellious qi, Earth has extreme profound qi; when stone types acquire this, they become Jiang Li, which is what is referred to here. Commonly written as [character variant].
[Collection and Explanation] Su Gong said: Jiang Shi is found everywhere, growing between soil and rock, shaped like ginger. There are five types: those that are white in color and soft without being gritty/astringent are superior; those from Licong East of Qizhou are good. They can be harvested at any time.
Su Song said: Found everywhere, must be collected immediately upon exposure without sunlight exposure; those slightly white are best.
[Flavor and Toxicity] Salty flavor, cold nature, non-toxic.
[Indications] Treats heat-pea sores, carbuncles, toxic swellings, etc. (from "Xin Xiu Ben Cao").
[Attached Prescriptions] Two old prescriptions, two new prescriptions.
Carbuncle swelling and pain: Use powder of white Jiang Shi, mix with egg white, apply to the affected area. Change when dry; pus will naturally discharge. Extremely effective. (Cui's Formula) Breast abscess swollen like a bowl with pain and swelling: Same method as above. ("Waitai Mi Yao")
Postpartum distension with rushing Qi causing choking/gagging: Jiang Shi and Dai Zhe Shi in equal parts, ground into powder, formed into pills the size of wu zi (bibenzol seeds) using vinegar paste. Take 30-50 pills per dose, washed down with vinegar soup. (Jiegu "Bao Ming Ji")
Generalized edema: Heat Jiang Shi until red-hot, place it in black cow urine, drink while hot. Drink one sheng per day. ("Qian Jin Fang")