The method of distinguishing between true and false Nanhong: 1. Feeder, burnt agate and common chalcedony have no vermilion spots peculiar to Nanhong under the jewelry magnifying glass. 2. Burning red agate has obvious fire robbery patterns. 3, red sapphire, heavy gemstone, no jade texture and glue texture, light can not penetrate. Look at the quality of Nanhong: 1. No cracks, crystals or appearance. 2. Brocade red, persimmon red and cherry red are of high value, and the purer the color, the brighter the better. 3. Good works are greater than good materials, with smooth lines, exquisite conception and more collectible value. With the above conditions, the greater the weight, the more precious it is. Nanhong is precious because of its natural red color. In addition, the scarcity of materials and extremely low output also make Nanhong even rarer. If glass jadeite, Wang Luyu and Hetian jade's suet jade are the best jadeite, then the "Nanhong" in agate is the "brother" jadeite that keeps pace with the above two kinds of best jadeite. The hardness of Nanhong is similar to that of white jade and jadeite, and the Mohs hardness is between 6.5 and 7. Suitable for carving. "Nanhong" has a strong momentum of catching up with jade and Hetian jade in investment, and the wealth effect is becoming more and more obvious.