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<br>Because the foremost supply of iron ores on the planet, hematite has formed civilizations for 1000's of years. The mineral was first used as the principle pigment in cave paintings often having a reddish hue, a signature trait of hematite. Later, it was - and nonetheless is - the primary source of iron, shifting the world out of the Stone Age and into the Iron Age. While hematite comes in many alternative shapes, sizes, colors and varieties, it always streaks purple, main it to garner the nickname "bloodstone." The reddish hue is the rationale for its title too, [BloodVitals SPO2](https://git.xming.cloud/darcyclubbe248) based mostly on the Greek word for blood, haima. Hematite even has extraterrestrial significance. It's the primary cause that the planet Mars is purple |
