From the appearance.

Purple rice grains are slender, relatively uniform in size, full in particles and purple in epidermis.

Black rice is black or dark brown, and the rice grains are oval.

Judging from the variety.

Purple rice belongs to glutinous rice, which is usually divided into purple japonica and purple glutinous rice.

There are two kinds of black rice seeds: indica rice and japonica rice, and the grain quality is divided into waxy and non-waxy.

In terms of nutritional value.

Purple rice is rich in protein, fat, lysine, tryptophan, vitamins, dietary fiber, iron, zinc, calcium, phosphorus and other nutrients needed by human body. It also contains phytochemicals, such as anthocyanins and saponins.

Nutritional value of black rice: It is rich in protein, amino acids and vitamins, especially vitamin B 1. In addition, it also contains cardiac glycoside, carotene, and trace elements such as iron, calcium, manganese and zinc.