[alias] Spirit Magnet; Live magnet; Xuanshi; Chu Shi; Needle aspirating stone; Iron ore; Male magnet; Iron stone

[Composition and structure] Magnetite is Magnetite or hematite mineralized Magnetite, often accompanied by quartz and Amphibole. The main component is Fe3O4, which often contains V, Ti, Mg, Mn, Al, etc; Equiaxed crystal system; The crystal is Octahedron; Most of them are granular aggregates or dense blocks.

【 Physical and chemical properties 】 Iron black, or with dark blue color; The stripes are black; Semi metallic luster; Uneven fracture surface; Hardness 5.5,; Density 5.16-5.18g/cm3. Having strong magnetism; Insoluble in water, only slightly soluble in acids and alkalis, relatively more soluble in alkali than in acid; The surface is prone to weathering, with a reddish color and reduced gloss and hardness.

【 Function and Use 】 It has the functions of calming and calming the mind, tonifying the kidneys and blood, nourishing yang and qi, calming the liver and relieving asthma, brightening the eyes and ears, and stopping golden sores and blood; Used to treat kidney wind deficiency, deafness and blindness, peripheral rheumatism, and limb joint pain; It can also treat symptoms such as seizures in children, inability to raise yang in men, and inability to retract the uterus in women; It is mostly taken orally.

【 Identification features 】 Black stripes, strong magnetism, cubic crystals.

【 Origin 】 Handan, Hebei, Daye, Hubei, and Anshan, Liaoning.