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Jade powder (Yuxie) must be ground extremely fine to prevent choking or obstruction, yet it is even better if it can be digested and dissolved in water. It primarily relieves thirst and throat discomfort, clears heat from the epigastrium, moistens the Heart Spirit (Shen), improves vision, aids voice projection, and stops panting; long-term continuous use can delay aging and make the body feel light. However, as it embodies pure Yang essence, those who do not abstain from alcohol and sexual indulgence should take it with caution, for even a small dose is like adding fuel to the fire, causing significant harm.

Agate (Manao) belongs to the jade category. Its nature is cold and acrid, thus it can dispel evil influences and be used as a hot compress for red and ulcerated eyes. Coral (Shanhu) grows by absorbing Yin Qi from water; its taste is sweet, its Qi is neutral, and it is non-toxic. Its nature mainly promotes dispersion, so when applied to the eyes, it removes corneal opacities (Yi). It further resolves stagnant blood, so when insufflated into the nose, it stops epistaxis.
Agate dispels evil spirits and treats red, ulcerated eyes via hot compress. Coral has many fine pores; when pierced, juice flows out. If gold is thrown into it, it becomes Gold Paste (Jinjiang); if jade is thrown into it, it becomes Jade Marrow (Yusui). Those who drink these can achieve longevity. Its main indications are resolving stagnant blood, removing eye opacities, and stopping epistaxis.

(Coral's) taste is sweet, its Qi is neutral, and it is non-toxic. Its white color corresponds to the Lung, making it a mild and benevolent mineral drug. Because it conforms to the Metal principle, it treats exterior muscle-skin conditions. Due to its sweet and neutral nature that descends and anchors, it enables Heart Fire to descend and Kidney Water to ascend, creating the image of "Both Fulfilled" (Ji Ji), thereby calming the Five Viscera, continuing the Essence (Jing), restoring what was lost, tonifying the Middle Jiao, lightening the body, and improving vision.
Yangqi Stone (Yangqishi) is the root of Mica (Yunmu). It is born embodying pure Yang Qi; its taste is salty, its Qi is warm, and it is non-toxic. The *Tu Jing* records that at Yangqi Mountain in Qizhou, there is often warmth; even in deep winter with heavy snow covering the region, this mountain remains free of snow, likely due to the steaming effect of Yangqi Stone. This indicates its warming nature. With its salty and warm properties, it specifically enters the Right Kidney and Mingmen (Gate of Life), tonifies Yang Qi, and is a sacred medicine for eliminating accumulated cold and stagnant blood lodged in the Lower Jiao. The best quality resembles the head and legs of an egret, with loose fibers like wild wolf teeth.
Mica (Yunmu) must be strictly refined according to method and should not be taken lightly. It treats dead skin on the body and wind-stroke-induced chills and fever. When traveling by carriage or boat, it treats bloody and non-bloody dysentery, as well as leukorrhea and metrorrhagia in women. It calms the Five Viscera, benefits the Essence (Jing), dispels evil Qi, adapts to cold and heat, treats generalized pruritus, applies to all painful sores, strengthens muscles, restores vitality, tonifies the Middle, treats deficiency caused by the Five Exhaustions and Seven Injuries, improves vision, directs Qi downward, enhances complexion, and prolongs life.
Yangqi Stone treats renal Qi exhaustion leading to impotence, breaks up blood stasis masses causing abdominal pain, removes dampness and itching of the male scrotum, drives out Cold Evil from the Five Viscera in women, treats metrorrhagia and metrorrhagia with dripping, supplements deficiencies, facilitates conception, and eliminates bad breath, sweating, and edema.