Iron sesquioxide crystallising in the hexagonal system.
Hematite has a metallic grey appearance but is classified as a red stone. Hematite debris or petals are blood red, hence its Greek name Haimatites.
It is attributed mythological significance, and the power to stop haemorraghing. In the old days it was used for signet rings and engraved gems, and also set in brooches.
It is a common mineral in many countries, where it is primarily used as good quality iron ore, and is a constituent of many paints. Only hematite of excellent quality, previously known as oligist, can be considered a fine or ornamental stone. The crystal cut into petals is known as "iron rose" due to its shiny metallic appearance. It was supposed to stop haemorraghing.