What is an iron ore sometimes used in jewelry?

Iron ore, specifically hematite, is sometimes used in jewelry due to its metallic luster and deep red to black color. Hematite is often polished and crafted into beads, pendants, and other decorative pieces, making it popular in bohemian and natural-themed jewelry. Its unique appearance, along with its association with grounding and protective properties, adds to its appeal in adornments.