Fire quartz (also called hematoid quartz) is a variety of clear to translucent quartz (SiO2) containing abundant hematite, limonite, or other iron‑oxide inclusions that produce vivid red, orange, brown, or “fiery” streaks, clouds, or internal flash. It forms when silica‑rich fluids crystallize in hydrothermal veins or cavities and iron oxides become entrained or precipitate within the growing quartz, often producing banding, phantoms, or suspended platelets. Fire quartz occurs in many quartz‑bearing regions worldwide—notable sources include Brazil, Madagascar, Morocco, and parts of the United States—and is cut and polished for cabochons, beads, tumbled stones, and decorative specimens.

In metaphysical and crystal‑healing contexts, fire quartz is associated with vitality, courage, motivation, and grounding—practitioners say it can boost energy, dispel lethargy, stimulate creativity, and help transform negative patterns into constructive action. These attributed properties stem from spiritual and cultural traditions rather than scientific evidence and should not be taken as medical, psychological, or professional advice.