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。
《罗浮志》记载：云核产于罗浮山，也属于云母一类。黄色的产自黄云峰；白色的产自白云峰，将其研碎调制成浆液服用，长期服用，能够吞吐五色的云彩。
药性平和，作为食品或药物使用，可以延年益寿、祛除疾病，功效与云母相同。
朱排山《柑园小识》记载：瀚海石产于瀚海地区。该地靠近泽旺，方圆三百里，没有水和草木，那里的石头大的像瓜、像拳头，小的像芋头、栗子，也有像珍珠、豆粒大小的，都具备五种颜色。质地像玛瑙，有孔窍且中间中空，孔窍中有沙子，可以入药。石质坚硬，外表可以碾磨，内部无法碾磨，所以通常直接利用其天然形态制作成器物。
主要功效是明目。
深山中都有这种石头，凡是山岩洞穴壁上有泉水滴落的地方，年代久了，水流经过之处就会生成水结（一种矿物沉积物），这是至阴之精华。凭借石乳的滋润，乘风力凝结而成，当地人称之为“岩香”。俗称为“水碱”。凿取石头得到的物质，颜色白如窑灰，放在手中感觉冷透骨头的才是真品。
《百草镜》记载：药性寒凉，外敷治疗烫伤和火伤，以及金疮出血，用水碱用火醋淬炼后，研磨成粉末，同白果肉用水浸泡，捣汁混合服用。
《名胜志》记载：产于庐山溪流中，以及有龙居住的地方，这种石头夜间摸起来凉冷的才是真品。王伯浓说：深山中有龙潜伏的地方都有这种石头，当地人等到龙升天离开后，顺着踪迹就能找到。石头有五种颜色，以透明者为佳，生用有毒，敲碎后投入醋中，片片能动并能重新合拢的为良。
药性大寒，磨成粉面能消除瘢痕，解热疮毒，用粉扑洒治疗暑热引起的痱子，立即消退。
按语：龙的身体纯阳，凡是阳性的物体，以阴为作用表现，所以龙潜伏处的石头都性冷，入夜更凉的，是真阴在起作用。投入醋中就能相互合拢的，是因为龙是东方之神，对应木行，木的味道是酸，石头感应了精气，所以遇到醋就能合拢，其功能在于清热灭瘢，也是取其寒凉收敛的性质来奏效罢了。
*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.