MercuryII sulphide 朱 砂 Zhū shā   Cinnabar  
This mineral has unacceptable toxicity, despite the mercury being largely detoxified (it cannot be absorbed as a free ion), but frequent use is not recommended because small amounts of mercury may accumulate. Coptis chinensis- Huang lian has very similar properties.
Nature: Cool    FLAVOR: Sweet, pleasant CHANNEL: Heart  TOXICITY: Toxic
FUNCTIONS
1. Settles nerves and controls convulsions.[1] Calm down convulsion, calm down spirits.[2]
2. Counteract toxic effects.[2] Detoxifies.[1]
INDICATIONS
1. Mania, apprehension, insomnia, nightmares, boils (treated externally).[1]
2. Epilepsy, convulsion, palpitation, insomnia with many dreams, blurred vision.[2]
3. External application for carbuncle and mouth canker and tongue canker.[2]
PREPARATIONS
In pills 0.3-0.9 g for each dose. A suitable amount may be used for external purposes.[1]
Cinnabar  0.3-0.5 g.[2]
COMPARISON with Coptis chinensis- Huang lian
Both Zhu Sha and Huang Lian cool Heart Fire, quiet the Spirit and resolve toxicity. Zhu Sha is heavy and expels Phlegm and is better for treating withdrawal-mania due to Phlegm-Fire and is only used externally for resolving toxicity. Huang Lian is better at draining Fire, clearing Heat, cooling Blood and treating restlessness, irritability, delirium and bleeding due to Heat entering the Ying Level in febrile disease. It is taken internally and applied topically. It dries Dampness and treats dysenteric disorders, focal distention, nausea, and vomiting associated with Damp-Heat.[2]
References
Inner Path can not take any responsibility for any adverse effects from the use of minerals. Always seek advice from a professional before using a mineral medicinally.