M E N U « Home | Browse Minerals | QuizzesMinerals by letter: All | K | G | O | A | H | T | P | C | Q | N | Z | S | E | W | M | B | F | D | L Minerals by class: Silicates | Halides | Carbonates | Sulfates | Oxides | Phosphates | Hydroxides | Native elements | Sulfides Silicate Subclasses: Nesosilicates | Pyroxenes | Amphiboles | Frameworks | Sorosilicates | Cyclosilicates | Phyllosilicates    « Back to mineral listing S T A U R O L I T E Click for expanded view StauroliteFe2Al9O6(SiO4)4(O,OH)2 Class: Silicate Hardness: 7 - 7.5 Density: 3.7 - 3.8 Streak: Gray Lustre: Vitreous Habit: Crystalline, often twinned Colours: Dark brown    Crystal System: Monoclinic Cleavage: Distinct Fracture: Subconchoidal Magnetism: None Reaction with HCl: Unknown Identification in hand sample: The "staurolite cross" and colour are indicative. Industrial / ecomonic uses: Used as an abrasive due to its high hardness.    Inaccurate data? Better photos? Use the contact form.

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