冠世墨玉，皇冠型，有时呈托桂型。花蕾圆尖形；花墨紫色，有光泽；花径17cm×8cm。外瓣3～4轮，质硬，基部具墨色斑；内瓣褶叠，紧密，瓣间杂有少量雄蕊；雌蕊退化变小或瓣化。花梗较长而硬，花朵直上。中花品种。
株型中高，偏矮，直立。叶面粗糙，叶大端微下垂，有紫晕，深绿色。生长势中，成花率高，株形紧凑，分枝少，萌蘖枝亦少。1973年赵楼牡丹园选育。
Crown black jade. Crown type, sometimes tuogui type. Flower buds rounded and pointed; The flowers are dark purple and shiny; Flower diameter 17cm × 8cm。 The outer petals are 3 ~ 4 rounds, hard, with ink spots at the base; The inner petals are folded and compact, with a small amount of stamens between the petals; Pistil reduced or petalized. The pedicel is long and hard, and the flowers are straight. Medium flower variety.
The plant type is medium high, short and upright. The leaf surface is rough, the big end of the leaf is slightly drooping, with purple halo and dark green. In the growth potential, the flowering rate is high, the plant shape is compact, the branches are few, and the sprouting branches are also few. Breeding in Zhaolou peony garden in 1973.
