Iron oxide  氧 化 铁 Yǎng huà tiě    
Iron oxide has several forms:
Hematite- Iron III oxide- Fe2O3. It contains both Fe2+ and Fe3+ ions and is sometimes formulated as FeO ∙ Fe2O3.
Magnetite- Iron II,III oxide- Fe3O4. Naturally magnetic.
Iron II oxide- FeO, which is rare.

代 赭 石 Dài zhě shí  Hematite, Iron ore, Ocher   Fe2O3  
Nature: Cold   FLAVOR: Bitter, sweet tasteless CHANNELS: Kidney, Liver
GROUP: Substances that Anchor, Settle and Calm the Spirit
FUNCTIONS
GROUP: Endogenous Wind- Extinguish Wind and stop tremors
1. Impedes retrograding disease symptoms, cools the blood.[1]
2. Relieve hiccup, calm down Liver, arrest bleeding.[2]
INDICATIONS
1. Vomiting, gagging, hiccups, asthma, hematemesis, epistaxis, flatulence, hemorrhoidal bleeding, metrorrhagia.[1]
2. Hiccup, vomiting, dizziness, tinnitus, hematemesis.[2]
CONTRAINDICATIONS: Pregnant women should take this herb with care.[2]
PREPARATIONS: Decoction  9-30 g.[1] Mineral 9-30 g.[2]

磁 石 Cí shí  Magnetite, Lodestone, Loadstone, Magnetic iron oxide, Fe3O4
About in the Spring and Autumn Period (770 BC–476 BC), the phenomenon of magnetite attracting iron was discovered in China. At that time, people likened this type of property to the love of mother to her children, which is also the very source of why magnetite is being called “Ci shi” in Chinese because “Ci” means a loving mother.
Nature- cold   FLAVOR: Acrid, pungent
FUNCTIONS
GROUP: Calm Spirit- Strong
1. Relieves convulsions and calms nerves, subdues the Yang and restores energy.[1]
2. Suppress Yang, accommodate Qi, relieve convulsion, secure spirits.[2]
INDICATIONS
1. Tinnitus and deafness associated with gonad deficiency, dizziness and blurred vision, epilepsy, palpitation and insomnia, anemia, senile shortness of breath.[1]
2. Blurred vision, ringing in ear, deafness, palpitation, insomnia, Kidney deficiency with panting.[2]
PREPARATIONS: Decoction  9-30 g.[1] 3-12 g.[2]

禹 余 糧 Yu yu liang Limonite Schedule2 Chinese Medicine board of Australia
Nature: Neutral  FLAVOR: Sweet, astringent CHANNELS: Stomach
FUNCTIONS
Astringe intestine to relieve diarrhea, astringe to stop bleeding, astringe leucorrhea.[3]
INDICATIONS
Chronic diarrhea and dysentery, hematochezia, metrorrhagia and metrostaxis, leukorrhagia.[3]
CONTRAINDICATIONS: Use with caution for pregnant women.[3]
PREPARATIONS: 10-20 g.[3]
生 铁 落  Shēng tiě luò   Pig iron rinse water, used during forging process.
Nature: Neutral   FLAVOR: Pleasant, acrid
FUNCTIONS
1. Neutralizes the Liver and relieves convulsions.[1]
INDICATIONS
1. Proneness to anger and mania, fright, epilepsy, and convulsive spasms in infants.[1]
PREPARATIONS: Decoction  15-30 g.[1]

References
Inner Path can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.