天然玛瑙手镯（收于2016年）玛瑙，早期被书写成"马脑"；南北朝时鸠摩罗什译《妙法莲华经》称："色如马脑，故从彼名"。明代谷泰撰写的《博物要览》中写道"玛瑙非石非玉，自是一类...."其主要成分为二氧化硅，由于与硅酸交替而夹杂氧化金属常重复成层，颜色可从极淡色以至暗色。
此玛瑙手镯色泽自然纯正，以绿色为主，夹杂一些深浅不一的渐变色纹带；图纹流畅，层次感强，无杂质、无沙心、无裂纹。Agate was written as "horse brain" in the early days; In the Northern and Southern Dynasties, Kumarajiva translated Miaofalianhua Sutra, saying: "Color is like a horse's brain, so it is named after another". In "Museum Notes" written by Gu Tai in Ming Dynasty, "Agate is neither Stone nor jade, have a style of one's own ..." Its main component is silicon dioxide, which is often repeatedly layered with metal oxide due to its alternation with silicic acid, and its color can range from very light to dark.
This agate bracelet is natural and pure in color, mainly green, with some gradient stripes of different shades; Smooth pattern, strong layering, no impurities, no sand center and no cracks.
