Definition: Fischerite is a mineral with the chemical formula FeO. It is found in several minerals, including hematite and plagioclase. Fischerite has a white to light brown color and is typically found in quartz crystals or inclusions within other minerals such as obsidian or agate. The name "fischerite" comes from the Greek word for "fire", which refers to its high electrical conductivity and ability to conduct electricity. It is often used in jewelry and decorative arts, particularly
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