罗浮志∶云核出罗浮，亦云母之类。黄者出黄云峰；白者出白云峰，屑之调为浆，服之
久，
能吞吐五色云。
性平，服食用之，延年却病，功同云母。
朱排山柑园小识∶瀚海石，出瀚海。地近泽旺，为方三百里，无水草，其石大者如瓜如
拳，
小者如芋栗，亦有如珠如豆者，皆具五色。如玛瑙，有窍而中空，其窍中有沙，可入药。石
质坚，其外可碾，其中不可碾，故每因形成器。
主明目。
深山皆有之，凡山岩洞壁上有泉滴下，年久，其水流处则生水结，乃至阴之精华。凭石
乳滋
液，乘风力而结者，土人名岩香。俗呼水碱。凿石取之，色白如窑灰，置手中冷入骨者真。
百草镜云∶性寒，敷汤火伤，金疮出血，用水碱火 醋淬，研末，同白果肉水浸，捣汁和服
名胜志∶出庐山溪中，及有龙居之所，此石夜觉凉冷者真。王伯浓云∶深山有龙蛰处皆
有之
，土人俟龙升去，乃迹而获之。有五色，以透明者 用，生用有毒，敲碎投醋中，片片能动
而相合者良。
性大寒，磨面能灭瘢痕，解热疮毒， 粉扑暑痱，立消。
按∶龙体纯阳，凡阳之体，以阴为用，故其蛰处石皆性冷，入夜更凉者，真阴为用也。
投醋
中辄能相合者，龙乃东方之神，应木，木味作酸，石感精气，所以遇醋而能合，其功能解热
灭瘢，亦取其寒敛之性以奏效耳。
*Luofu Zhi* (Records of Mount Luofu) states: Yunhe (Cloud Core, a mineral substance) originates from Mount Luofu and belongs to the category of Yunmu (Mica). The yellow variety comes from Huangyun Peak; the white variety comes from Baiyun Peak. When ground into powder and mixed into a paste for consumption, long-term use enables one to inhale and exhale clouds of five colors.
Its nature is neutral (Ping). Used as food or medicine, it prolongs life and prevents disease, with effects similar to Yunmu (Mica).
Zhu Paishan’s *Ganyuan Xiaoshi* (Brief Records from the Citrus Garden) states: Hanhai Stone (Ocean Sea Stone) originates from the Hanhai region. This area is near Zewang, covering three hundred li in circumference, devoid of water and vegetation. The stones there are large like melons or fists, small like taro or chestnuts, and some like pearls or beans, all possessing five colors. They resemble Manao (Agate), have pores and are hollow inside, containing sand within the pores that can be used in medicine. The stone quality is hard; the exterior can be ground, but the interior cannot, so they are often fashioned into artifacts based on their natural forms.
It primarily benefits vision (ming mu).
Such stones are found in deep mountains. Wherever spring water drips down from mountain rock cave walls over many years, water結 (Shuijie, a calcareous deposit formed by dripping water) accumulates where the water flows; this is the essence of extreme Yin. Formed relying on the moisture of Shiru (Stalactite dripstone) and condensing under the wind's force, locals call it Yanxiang (Rock Fragrance). Commonly known as Shuijian (Water Alkali). Obtained by chiseling stone, it is white like kiln ash; if it feels bone-chillingly cold when held in the hand, it is authentic.
*Baicao Jing* (Mirror of Hundred Herbs) states: Its nature is cold. Applied externally to treat burns and scalds, and bleeding from metal wounds. It is quenched with vinegar after heating, ground into powder, soaked in water with Baiguo (Biloba Fruit/Ginkgo Seed), crushed to extract juice, and taken internally mixed together.
*Mingsheng Zhi* (Records of Famous Places) states: It is found in streams of Mount Lu and places where dragons reside. Stones that feel cool and cold at night are authentic. Wang Bonong said: Such stones are present wherever dragons hibernate in deep mountains. Locals wait until the dragon ascends and leaves, then follow the traces to obtain them. The stones have five colors; transparent ones are preferred. Raw use is toxic. If crushed and thrown into vinegar, pieces that move and recombine are considered good.
Its nature is greatly cold. Ground into flour/powder, it can eliminate scars, resolve heat-toxins from sores, and applied as powder for summer heat prickly heat (Shufei), causing immediate disappearance.
Note: The dragon's body is purely Yang. For any Yang entity, Yin serves as its functional manifestation. Therefore, stones in dragon hibernation sites are naturally cold; those cooler at night indicate true Yin functioning. The fact that they recombine when thrown into vinegar is because the Dragon is the deity of the East, corresponding to Wood. Wood's flavor is sour. The stone senses this vital energy, hence it combines upon encountering vinegar. Its functions of clearing heat and eliminating scars also rely on its cold and astringent properties to achieve efficacy.