（本经上品）
【气味】甘酸寒，无毒。
【主治】主青盲，耳聋，明目，利九窍，通血脉，养精神，益肝气。久服轻身延年。
【核】曰∶出益州山谷，及越 山，今蔚、兰、宣、梓诸州亦有。产上饶，似钟乳石，
片片含紫色光彩者佳，次则蜀严道，及北代山者亦好。玉洞要诀云∶空青受庚辛赤金之精，
甲乙阴灵之气，多近名泉，久而含润。初从坎中出者，其内有水如浆，味颇甘酸，经久即干，
如连珠，金星灿灿然。庚辛玉册云∶多生金坎中，生生不已，故青为之丹。有如拳大，及卵
形者，乃得空中，有浆如油，出铜坑者亦佳，止堪作画。又有石青、杨梅青，皆是一体，而
质有精粗。点化以曾青为上，空青次之，杨梅青又次之。但圆实如珠者，不堪用也。修事，
各随方制，酒浸醋拌，制过乃可变化。畏菟丝子。
绍隆王先生云∶色青法木，故可入肝。功能明目，肝主开明于目故也。然瞳子神光，专
司在
【 】曰∶空青黄赤金矿之精粹也。盖五行金位于西，黄为五金土，赤为五金火也。造
化指南云∶紫阳之气生绿，青阳之气生青，空青者，石绿之得道者也。黄帝云∶青阳走上窍，
盖肝窍目，故益肝，明目清盲，并利九窍也。通血脉者，诸脉皆属于目也；养精神者，心藏
神，肾藏精，藉金木之交互，火水之合璧也。然则空青以功用诠名矣。
【《神农本草经》列为上品】
【气味】味甘、酸，性寒，无毒。
【主治功效】主要治疗青盲（视物不清或失明），改善耳聋，使眼睛明亮，疏通九窍，通畅血脉，滋养精神，补益肝气。长期服用可使身体轻盈，延年益寿。
【考证】曰：空青产于益州的山谷，以及越山，如今蔚州、兰州、宣州、梓州等地也有出产。上饶出产的空青，形状像钟乳石，片状且含有紫色光彩的为佳品，其次是蜀地严道和北代山出产的也不错。《玉洞要诀》说：空青承受了庚辛金和赤金的精华，以及甲乙阴灵之气，多靠近名泉，久而久之蕴含润泽。刚从坎位（北方/水）中产出的，内部有水如浆液般，味道颇甘酸，时间久了就会变干，像连珠一样，金星灿灿发光。《庚辛玉册》说：多生于金坎之中，生生不息，所以青色变为丹色。有的像拳头大，有的呈卵形，乃是得天地中空之气的，内有浆液如油，从铜坑中产出的也很好，但只适合用来作画。又有石青、杨梅青，都是同一种类，只是质地有精粗之分。用于点化炼丹时，以曾青为最佳，空青次之，杨梅青又次之。但是圆实如珠子般的，不堪使用。炮制方法，各依方剂要求，用酒浸泡、醋拌，经过炮制后才能发生药效变化。忌与菟丝子同用。
绍隆王先生说：颜色青对应五行中的木，所以可以入肝经。其功能在于明目，因为肝主开明于目。然而瞳仁的神光，专门由……
【 】曰：空青是黄赤金矿的精华。大概五行中金位于西方，黄为五金之土，赤为五金之火。《造化指南》说：紫阳之气产生绿色，青阳之气产生青色，空青是石绿中得道的品种。黄帝说：青阳之气走上窍，肝开窍于目，所以能益肝，明目清盲，并通利九窍。通畅血脉，是因为诸脉皆属于目；滋养精神，是因为心藏神，肾藏精，借助金木的交互作用，水火合璧的功效。既然这样，空青是根据其功用而得名。
[Classified as Upper Grade in the *Shennong Bencao Jing*]
【Flavor and Nature】Sweet, sour, cold, non-toxic.
【Indications】Primarily treats Qingmang (visual impairment or blindness), improves deafness, brightens the eyes, unblocks the Nine Orifices (the nine openings of the head and face), promotes blood circulation, nourishes the spirit, and benefits Liver Qi. Long-term consumption lightens the body and prolongs life.
【Verification】It is stated: Kongqing originates from the valleys of Yizhou and Yuexue. Currently, it is also produced in Weizhou, Lanzhou, Xuanzhou, and Zizhou. The Kongqing produced in Shangrao resembles Zhongruishi (Stalactite); those that are flaky and contain purple luster are considered superior. Those from Yandao in Shu and Beidai Mountain are also good. The *Yudong Yaojue* states: Kongqing receives the essence of Geng-Xin Metal and Red Metal, along with the Yin spiritual energy of Jia-Yi. It is often found near famous springs, retaining moisture over time. When first extracted from Kan (North/Water element), it contains liquid inside like broth, tasting sweet and sour; after a long period, it dries out, resembling linked pearls with shining golden stars. The *Gengxin Yuce* states: It grows mostly within Jin-Kan, generating endlessly, thus turning green into cinnabar red. Some are fist-sized or egg-shaped, having obtained the hollow air, containing liquid like oil; those from copper pits are also excellent but only suitable for painting. There are also Shiqing (Malachite) and Yangmeiqing (Bayberry Green), which are of the same origin but differ in texture refinement. For alchemical processing, Zengqing is best, Kongqing is second, and Yangmeiqing is third. However, those that are solid and round like beads are unusable. Processing methods vary according to prescriptions: soaked in wine, mixed with vinegar, and processed before it can undergo transformation. It opposes Tusizi (Cuscutae Semen).
Mr. Wang Shaolong said: Its green color corresponds to Wood in the Five Elements, so it enters the Liver meridian. Its function is to brighten the eyes because the Liver governs vision. However, the divine light of the pupil is specifically governed by...
[ ] states: Kongqing is the essence of Yellow-Red Copper Ore. Generally, Metal is located in the West in the Five Elements; Yellow represents Earth among the five metals, and Red represents Fire among the five metals. The *Zaohua Zhinan* states: Zi Yang Qi generates Green, Qing Yang Qi generates Cyan. Kongqing is the enlightened form of Shilv (Green Stone). The Yellow Emperor said: Qing Yang Qi ascends to the upper orifices. Since the Liver opens into the eyes, it benefits the Liver, brightens the eyes, clears blindness, and unblocks the Nine Orifices. Promoting blood circulation occurs because all meridians connect to the eyes; nourishing the spirit occurs because the Heart stores Shen (Spirit) and the Kidney stores Jing (Essence), relying on the interaction of Metal and Wood, and the union of Water and Fire. Thus, Kongqing is named according to its functions.