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Dumortierite

Formula: Al(Al2O)(Al2O)2(SiO4)3(BO3)
The given formula is the anhydrous end-member. Hydrogen incorporation leads to a more complex formula: (Al,◻)[Al2(O,OH)](Al2O)2[SiO3(O,OH)]3(BO3)
Colour: Blue, greenish-blue, violet-blue, pale blue, pink, red
Luster: Vitreous
Hardness: 7 - 8
Specific Gravity: 3.21 - 3.41
Crystal System: Orthorhombic
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4 products
  • Dumortierite in Quartz. 18.4g - The Crystal Connoisseurs
    €127,15
    €127,15
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  • €104,14
    €104,14
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  • €108,99
    €108,99
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  • Dumortierite in Quartz. 38g - The Crystal Connoisseurs
    €145,31
    €145,31
    Sold out