Our hematite is natural, leaving a red streak when scratched across unglazed porcelain. (Simulated products such as Hematine and Hemalike leave a gray streak and are composed of iron oxide).The ancient Egyptians used this Hematite to aid in curing abnormalities and diseases of the blood, to reduce inflammation, and to treat hysteria. Hematite itself exhibits an ability to heal itself; if scratched and then rubbed, the scratch will often disappear.Today Hematite is used for grounding, calming, dispelling worry and negativity, clarity, self-esteem, physical energy, and to cure insomnia, jet lag, or any other physical and mental drain on the body Natural Hematite Gemstone Hematite is a silvery, shiny opaque mineral form of iron oxide. No Fire: Set after firing.Natural gemstones can vary in thickness. If you need to know the vertical dimension of a specific gemstone, please contact customer service