明澈如水精，其色紫而不匀。张仲景治风热螈 及惊痫螈 风引汤∶紫石英、白石
英、寒水石、石膏、干姜、大黄、龙齿、牡蛎、甘草、滑石等分，混合 （五汝切）咀（子
与
切。）以水一升，煎去三分，食后量多少温呷，不用滓，服之无不效者。
状如紫石英，但差，大而六棱，白色如水精。紫白二石英，当攻疾，可暂煮汁用，
未闻久服之益。张仲景之意，只令 咀，不为细末者，岂无意焉。其久服，更宜详审。
今四方皆有，以舌拭之，粘着者为佳。有人病大肠寒滑，小便精出，诸热药服及一
斗二升，未甚效。后有人教服赤石脂、干姜各一两，胡椒半两，同为末，醋糊丸如梧桐子大
，空心及饭前米饮下五七十丸。终四剂，遂愈。
有初生未盈月小儿，多啼叫，致脐中血出，以白石脂细末贴之，即愈。未愈，微微
炒过，放冷再贴，仍不得剥揭。
石中黄子，此又字误也，子当作水，况当条自言未成余粮黄浊水，焉得却名之子
也？若言未干者，亦不得谓之子也。子字乃水字无疑。又曰太一余粮者，则是兼石言之者也
。今医家用石中黄，只石中干者及细末者，即便是。若用禹余粮石，即用其壳。故本条言一
名石脑，须火烧醋淬。如此即是石中黄水为一等，石中黄为一等，太一余粮为一等，断无疑
焉。
色泽明澈如同水晶，颜色呈紫色但不均匀。张仲景治疗风热引起的抽搐以及惊痫引起的抽搐，使用风引汤：紫石英、白石英、寒水石、石膏、干姜、大黄、龙齿、牡蛎、甘草、滑石各等分，混合后捣碎（五汝切）成粗颗粒（子与切）。用水一升，煎煮至减少三分之一，饭后根据患者情况适量温服药汁，不服用药渣，服用后没有无效的。
形状像紫石英，但稍大一些，且有六个棱面，颜色白色如同水晶。紫石英和白石英，在治疗疾病时，可以暂时煮取汁液使用，未曾听说长期服用有益处。张仲景的用意，只是要求将药材捣碎成粗颗粒，而不是磨成细粉，其中难道没有深意吗？对于长期服用，更应当仔细审慎。
现在四方各地都有出产，用舌头舔拭它，粘着舌头的品质较好。有人患大肠虚寒滑泄，小便失禁遗精，服用各种热性药物累计达一斗二升，效果不明显。后来有人教导服用赤石脂、干姜各一两，胡椒半两，共同研为细末，用醋糊制成梧桐子大小的丸剂，空腹及饭前用米饮送服五七十丸。总共服用四剂，于是痊愈。
有出生未满月的小儿，因多啼叫导致脐中出血，用白石脂细末外贴患处，立即痊愈。如果未愈，稍微炒过后，放凉再贴敷，仍然不得剥揭伤口。
“石中黄子”这里的“子”字是误写，“子”应当作“水”，况且该条目自己说它是未形成的余粮黄浊水，怎么能又命名为“子”呢？如果说是指未干燥的状态，也不能称为“子”。“子”字无疑是“水”字的讹误。又说太一余粮，则是兼指石头而言的。现在的医家使用石中黄，只取石中干燥的部分及细末部分，这就是正确的。如果使用禹余粮石，就使用其外壳。所以本条目说又名石脑，必须经过火烧和醋淬处理。如此看来，石中黄水是一类，石中黄是一类，太一余粮是一类，断然无疑。
Clear as rock crystal, its color is purple but uneven. Zhang Zhongjing treats wind-heat-induced convulsions (feng re chou) and convulsions caused by fright epilepsy (jing xian chou) using Fengyin Tang: Zhi Shiying (Fluorite), Bai Shiying (White Fluorite), Hanshuishi (Cold Water Stone), Shigao (Gypsum Fibrosum), Ganjiang (Dried Ginger), Dahuang (Rhei Radix et Rhizoma), Longchi (Dragon Tooth), Muli (Ostrea Shell), Gancao (Licorice Root), Huashi (Talcum), each in equal parts. Mix them, crush into coarse particles (pronunciation note: Wu Ru Qie), and (pronunciation note: Zi Yu Qie). Add one sheng of water, decoct until reduced by one-third. After meals, take a suitable amount warm, without the dregs; there is no case where it fails to be effective.
Its shape resembles Zhi Shiying, but slightly larger, with six facets, white in color like rock crystal. Both Zhi Shiying and Bai Shiying can be temporarily boiled for their juice when treating diseases, but long-term consumption has not been heard to bring benefits. Zhang Zhongjing's intention was only to crush the herbs into coarse particles rather than grind them into fine powder; surely there is a deeper meaning here. Regarding long-term use, one should be more cautious and deliberate.
Nowadays, they are found everywhere. When licked with the tongue, those that stick well are considered superior. Someone suffered from cold and slipping of the large intestine (da chang han hua) and seminal emission during urination (xiao bian jing chu). Various warming medicines were taken totaling one dou two sheng, yet with little effect. Later, someone advised taking Chishizhi (Red Halloysite) and Ganjiang (Dried Ginger) each 1 liang, and Hujiao (Black Pepper) 0.5 liang, ground together into powder, formed into pills the size of paulownia seeds using vinegar paste. Taken on an empty stomach and before meals with rice drink, 50-70 pills per dose. After four courses of treatment, he recovered.
For infants under one month old who cry excessively causing bleeding from the umbilicus, applying fine powder of Baishi Zhi (Halloysite Alba) externally cures it immediately. If not cured, lightly stir-fry it, let it cool, then apply again, ensuring the wound is not peeled or disturbed.
"Shi Zhong Huang Zi" contains a character error here; "Zi" should be "Shui". Furthermore, the entry itself states it is unformed, turbid yellow water resembling Yuliang, so how could it be named "Zi"? Even if referring to the un-dried state, it cannot be called "Zi". The character "Zi" is undoubtedly a corruption of "Shui". It is also said to be Taiyi Yuliang, which refers to the stone aspect. Currently, physicians using Shi Zhong Huang only utilize the dried part within the stone and its fine powder, which is correct. If using Yu Yuliang Shi (Yu Yuliang Stone), one uses its shell. Therefore, this entry mentions another name "Shi Nao", requiring firing in fire and quenching in vinegar. Thus, Shi Zhong Huang Shui is one category, Shi Zhong Huang is another, and Taiyi Yuliang is a third; this distinction is unquestionable.