16.5.8: Smokey Quartz

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    From LibreTexts, under CC BY-NC-SA 2.5, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Smoky Quartz
    Chemical composition SiO2 Silicon dioxide
    Crystal system Trigonal
    Habit Prismatic
    Cleavage Poor
    Fracture Conchoidal
    Hardness 7
    Optic nature Uniaxial +
    Refractive index 1.544 - 1.553
    Birefringence 0.009
    Dispersion 0.013
    Specific gravity 2.65
    Lustre Vitreous
    Pleochroism Weak to moderate

    This page titled 16.5.8: Smokey Quartz was last modified on Fri, 06 May 2022 23:29:27 GMT and is shared under a CC BY-NC-SA 2.5 license and was authored, remixed, and/or curated by gemology via source content that was edited to the style and standards of the LibreTexts platform.