Based on a comparison of mineralogical and geochemical characteristics between black jadeites (inky black jades) from different producing areas of the world, the authors hold that the black jadeites currently on the market can be mainly classified into jadeite jade, omphacitic jadeite jade and hornblende jade whose main components are jadeite, omphacite and dark green hornblende respectively. They include black-chicken jade, ink jadeite and black-kosmochlor from