Black Kyanite pendant The dimensions are 5.6 x 3.5 cm Let your own heart decide what this Black Kyanite pendant can give you, or even better what you can bring each other. For it is an exchange. Just open you heart and imagine how it will be. Black Kyanite is an aluminum-rich silicate mineral that forms in pegmatites at extremely high pressure. It crystallizes in the form of “fan-like” blades that can reach nearly half a foot in length! Most of the Black Kyanite on the market comes directly from the Minas Gerais region of Brazil, although there are other important localities within Burma, South Africa, and India.