味辛、咸，平，无毒。主蛊毒及蛇、菜、肉诸毒，恶疮。不可久服，令人瘦。一名推
青，一名推石。生益州川谷。
陶隐居云∶俗方及《仙经》并无用此者，亦相与不复识。
味辛，寒，无毒。主辟恶，熨目赤烂，红色似玛瑙，亦美石之类，重宝也。生西国玉
石间，来中国者皆以为器，亦云玛瑙珠。是马口中吐出，多是胡人谬言，以贵之耳。（新补
见陈藏器。）
陈藏器∶玛瑙出日本国，用砑木不热为上，砑木热非真也。
衍义曰∶玛瑙，非石、非玉，自是一类。有红、白、黑色三种，亦有其纹如缠丝者，出
西裔
佳。彼土人小者碾为好玩之物，大者碾为器。今古方入药，绝可用。此物，西方甚重，故佛
经多言之。其马口吐出，既知谬言，不合编入。
\r太阴玄精\pd44.bmp\r
味咸，温，无毒。主除风冷，邪气湿痹，益精气，妇人痼冷、漏下，心腹积聚冷
气，止头疼，解肌。其色青白、龟背者良，出解县。（今附）
图经曰∶太阴玄精，出解县，今解池及通、泰州积盐仓中亦有之。其色青白、龟背者佳。
采
无
时。解池又有盐精，味更咸苦，青黑色，大者三、二寸，形似铁铧嘴，三月、四月采。亦主
除风冷，无毒。又名泥精，盖玄精之类也。古方不见用者，近世补药及治伤寒多用之。其着
者，治伤寒三日，头痛，壮热，四肢不利。正阳丹∶太阴玄精、硝石、硫黄各二两， 砂一
两，四
物都细研，入瓷瓶子中，固济以火半斤，于瓶子周一寸， 之，约近半日，候药青紫色，住
火。待冷取出，用腊月雪水拌令匀湿，入瓷罐子中，屋后北阴下阴干。又入地埋二七日，取
出细研，以面糊和为丸，如鸡头实大。先用热水浴后，以艾汤研下一丸。以衣盖，汗出为瘥
。
唐本余∶近地亦有，色赤、青白，片大不佳。沈存中云∶大卤之地，即生阴精石。
衍义曰∶太阴玄精石，合他药，涂大风疾，别有法。阴证伤寒，指甲、面色青黑，六脉
沉细
而
疾，心下胀满、结硬、燥渴，虚汗不止，或时狂言，四肢逆冷，咽喉不利，腹疼，亦须佐他
药兼之。《图经本草》已有法，唯出解州者良。
[Fuqing]
Taste: Acrid, Salty. Nature: Neutral. Toxicity: Non-toxic. Indications: Mainly treats gu poison (a type of ancient Chinese poisoning or parasitic disease) and various poisons from snakes, vegetables, and meat, as well as malignant sores. It should not be taken for a long time, as it causes emaciation. Also known as Tuiqing, also known as Tuishi. Grows in the valleys of Yizhou.
Tao Hongjing stated: Neither common prescriptions nor the "Immortal Classics" use this substance, and people no longer recognize each other's knowledge of it.
[Manato / Agate]
Taste: Acrid. Nature: Cold. Toxicity: Non-toxic. Indications: Mainly repels evil influences, and is used to compress red, rotting eyes. Its red color resembles Manato (Agate); it is a type of beautiful stone and a precious treasure. It grows among jade stones in Western Regions; those brought to China are made into vessels, also called Manato pearls. The claim that it is spat out by horses is mostly false talk by Hu people to inflate its value. (New supplement found in Chen Cangqi's works.)
Chen Cangqi stated: Manato comes from the country of Japan. When grinding wood with it, if it does not become hot, it is superior; if it becomes hot, it is not genuine.
Yanyi states: Manato is neither stone nor jade; it belongs to a distinct category. There are three colors: red, white, and black. Some have patterns like twisted silk. Those from the Western borders are excellent. Local people grind small ones into playthings and large ones into vessels. In modern ancient prescriptions, it can be used medicinally. This substance is highly valued in the West, hence frequently mentioned in Buddhist scriptures. Since the story of it being spat from a horse's mouth is known to be false, it should not have been included.
[Taiyin Xuanjing]
Taste: Salty. Nature: Warm. Toxicity: Non-toxic. Indications: Mainly dispels wind-cold, pathogenic qi, damp-bi obstruction, benefits essence and qi, treats chronic cold conditions and leukorrhea/menorrhagia in women, accumulation of cold qi in the heart and abdomen, stops headache, and resolves the muscle layer. Those with greenish-white color and a turtle-shell-like texture are good; they come from Jie County. (Currently appended.)
Tujing states: Taiyin Xuanjing comes from Jie County. Currently, it is also found in the salt pools of Jiechi and in the salt warehouses of Tongzhou and Taizhou. Those with greenish-white color and a turtle-shell texture are excellent. There is no specific season for harvesting. Jiechi also produces salt essence, which tastes more salty and bitter, is dark green-black, up to two or three inches in size, shaped like an iron plowshare tip, harvested in March and April. It also mainly dispels wind-cold and is non-toxic. Also known as Nijing, likely a type of Xuanjing. It was not used in ancient prescriptions but is commonly used in recent times for tonics and treating Shanghan (Cold Damage). Specifically, crystallized forms treat headache, high fever, and limb stiffness after three days of Shanghan.
Zhengyang Dan formula: Taiyin Xuanjing, Potassium Nitrate (Xiaoshi), Sulfur (Huang) each 2 liang, Sand 1 liang. All four substances are finely ground together, placed in a porcelain bottle, sealed tightly with mud, and heated with half a jin of charcoal heat around the bottle at a distance of one cun. After about half a day, when the medicine turns blue-purple, stop heating. After cooling, take it out, mix evenly with snow water collected in the twelfth lunar month until moist, place in a porcelain jar, and dry in the shade under the north side of the house behind the roof. Then bury it in the ground for twenty-seven days, take it out, grind finely, and bind with flour paste to make pills the size of a chestnut. First, take a hot bath, then swallow one pill with Artemisia soup. Cover with clothes; sweating indicates recovery.
Tangben Yu states: It is also produced in nearby areas, with red and greenish-white colors, but large flakes are not good. Shen Cunzhong stated: In saline lands, Yinjing Stone naturally grows.
Yanyi states: Taiyin Xuanjing Stone, when combined with other herbs, has special methods for applying to Da Feng Ji (severe skin diseases like leprosy). For Yin Syndrome Shanghan, presenting with cyanotic nails and complexion, deep, fine, and rapid pulse, epigastric fullness and hardness, dry thirst, continuous deficiency sweating, occasional delirium, cold limbs, throat discomfort, and abdominal pain, it must be assisted by other herbs. Tujing Bencao already records methods; only those from Jiezhou are of good quality.