无毒 土生
光明盐主头面诸风目赤痛多眵（音蚩）泪（名医所录）【名】石盐 圣石【地】（图经曰）
生
盐州五原盐池下凿取之大者如升皆正方光澈又阶州一种生山石中不由煎炼自然成盐色甚明莹
彼人甚贵之云即光明盐也【时】（生）无时（采）无时【用】白净光澈者佳【质】类方解石
【色】
白
无毒 土石生
绿盐主目赤泪出肤翳眵暗（名医所录）【地】（图经曰）以光明盐 砂青铜屑酿之为块而
色
绿其真有出焉耆国水中石下取之状若扁青空青（别录云）波斯国在石上生按舶上将来为之石
绿
装色久而不变中国以铜醋造者不堪入药色亦不久【时】（生）无时（采）无时【用】绿色成
块者
好【质】状如扁青空青【色】绿【味】咸苦辛【性】平【气】味浓于气阴中之阳【臭】朽【主】
明目消翳【制】研细用【治】（疗）（海药云）治小儿无辜疳气
有毒 土生
铁主坚肌耐痛（神农本经）【地】（图经曰）单言铁者 铁也诸铁不着所出州土今江南西
蜀
有炉冶处皆有之铁乃黑金也其体坚重至于熔冶然后成器盖铁有生有熟有钢有精有落有粉并华
粉胤粉之类祈文立条而 铁乃再三拍打以作 者亦谓之熟铁也【时】（采）无时【用】 铁
【质】
类磁石【色】黑【味】辛【性】平散【气】气之薄者阳中之阴【臭】腥【反】畏磁石锻石炭
【解】制石亭脂毒
[Guangming Yan (Light Salt)]
Non-toxic, produced in the earth.
Guangming Yan (Light Salt) [Rock Salt] primarily treats various wind pathogens affecting the head and face, causing redness and pain of the eyes, excessive eye discharge (pronounced 'chi'), and tearing (Recorded by Famous Physicians). [Names] Shi Yan (Stone Salt), Sheng Shi (Holy Stone). [Origin] According to *Tu Jing* (Illustrated Classic): Produced by digging below the Yanyuan Salt Pool in Yanzhou State. The large pieces are like a sheng (unit of measure), all square-shaped, bright and transparent. Additionally, Jiazhou has a type growing in mountain rocks, formed naturally without boiling or refining, with very clear and bright color; locals highly value it, saying this is Guangming Yan. [Harvesting Time] (Growth) Available at any time. (Collection) Collectible at any time. [Usage] White, clean, bright, and transparent pieces are preferred. [Texture] Similar to Calcite. [Color] White.
[Lv Yan (Green Salt)]
Non-toxic, produced in earth and stone.
Lv Yan (Green Salt) primarily treats red eyes, tearing, skin nebulae, and dim eye discharge (Recorded by Famous Physicians). [Origin] According to *Tu Jing*: Made into blocks by fermenting Guangming Yan with bronze powder from sand, resulting in a green color. The truly natural ones are found under stones in water in Yanqi Kingdom, resembling Bian Qing (Blue Malachite) and Kong Qing (Hollow Malachite) (According to *Bie Lu*); those from Persia grow on stones. Those brought by ship are called Shi Lv (Stone Green). Their color remains unchanged over time. Those manufactured in China using copper and vinegar are unsuitable for medicinal use, and their color does not last long. [Harvesting Time] (Growth) Available at any time. (Collection) Collectible at any time. [Usage] Green, solid blocks are good. [Texture] Shape resembles Bian Qing and Kong Qing. [Color] Green. [Taste] Salty, Bitter, Pungent. [Nature] Neutral. [Qi and Flavor] The flavor is stronger than the qi; belongs to Yin within Yang. [Odor] Rotten odor. [Main Efficacy] Brightens the eyes, eliminates nebulae. [Processing] Grind into fine powder for use. [Treatment] (According to *Hai Yao Ben Cao*) Treats infantum malnutrition (Wugu Gan Qi) in children.
[Tie (Iron)]
Toxic, produced in the earth.
Tie (Iron) [Ferrous Metal] primarily firms muscles and increases tolerance to pain (Shennong Ben Cao). [Origin] According to *Tu Jing*: When referred to simply as "Iron," it means Iron. Various types of iron are not limited to specific provinces. Currently, wherever there are smelting furnaces in Jiangnan and Western Shu, iron is available. Iron is known as Black Gold. Its body is hard and heavy; only after smelting can it be fashioned into vessels. There are raw iron, cooked iron, steel, refined iron, fallen iron, powdered iron, as well as Hua Fen (Flower Powder), Yin Fen (Seed Powder), etc., listed by Qi Wenli. Iron that is beaten repeatedly to make it is also called cooked iron. [Harvesting Time] (Collection) Collectible at any time. [Usage] Tie (Iron). [Texture] Similar to Magnetite. [Color] Black. [Taste] Pungent. [Nature] Neutral and dispersing. [Qi and Flavor] The qi is thin; belongs to Yin within Yang. [Odor] Fishy smell. [Antagonism/Fear] Feels adverse to Cishi (Magnetite), Duanshi (Smelted Stone), and Tan (Charcoal). [Detoxification] Resolves the toxicity of Shiting Zhi (Stalactite).