Schreibersite (rhabdite)

Mohs scale hardness: 6,5–7Specific gravity: 7,0–7,3Schreibersite is generally a rare iron nickel phosphide mineral, though common in iron-nickel meteorites. Its color ranges from bronze to brass yellow to silver white. It is opaque with a metallic luster and a dark gray streak. In 2007, researchers reported that schreibersite and other meteoric phosphorus bearing minerals may be the ultimate source for the phosphorus that is so important for life on Earth.References

• 1. https://en.wikipedia.org/wiki/Schreibersite