赭石釘赭石产安徽,塊形,陽面有釘,陰面有窩。赤赭石产广西,个形,質量比釘赭石劣。四川所产亦个形,惟色較淡,更劣。应标明出售。桂产安南者名为安桂,产云南蒙自者名为蒙桂,产广西者名为西桂,产少数民族者名为猺桂。优劣以所含性味为标准,优者純甜而無渣,內部現裂痕如朽材,劣者味辛辣,並刺喉,坚硬。降香色純紫体重而坚实,火燒現油泡,有清香气为优。紅白相兼,体輕,火燒現明火,少 Rock stone nail stone production in Anhui, block shape, Yang surface nails, Yin Yang surface nest. The red crater is produced in Guangxi, and its shape is of inferior quality to the nail stone. Produced in Sichuan is also a form, but the color is lighter and worse. Should indicate the sale. The Annagami of Gui is called Angui, and the producer of Mengzi in Yunnan is called Menggui. The name of producing Guangxi is Xigui, and the ethnic minority is named Guigui. Advantages and disadvantages are based on the nature of taste. Excellent people are sweet and slag-free. Internal cracks are bad, bad tastes are spicy, and throats are hard. Falling scent Pure purple weight and solid, fire burning oil bubbles, there is excellent fragrance. Red and white, light, fire burns out, less