Kornerupine- (Mg,Fe2+,Al)10(Si,Al,B)5O21(OH,F)

Kornerupine is a rare mineral named in honor of Andreas Nikolaus Kornerup (1857-1881), a Danish naturalist, artist and explorer. Kornerupine was first described in 1884 for an occurrence in Fiskernaes in SW Greenland. It occurs in boron-rich volcanic and sedimentary rocks which have undergone high grade metamorphism. It is also found in metamorphosed anorthosite complexes.

Optical Properties:
Form: From massive-fibrous to prismatic (crystals Shaped like slender prisms).
Color: Colorless.
Pleochroism: Colorless to pale green.
Relief: Moderate.
Interference colors: Low, I order gray-yellow.


Bibliography



• Bucher, K., & Grapes, R. (2011). Petrogenesis of metamorphic rocks. Springer Science & Business Media.
• Fossen, H. (2016). Structural geology. Cambridge University Press.
• Howie, R. A., Zussman, J., & Deer, W. (1992). An introduction to the rock-forming minerals (p. 696). Longman.
• Passchier, Cees W., Trouw, Rudolph A. J: Microtectonics (2005).
• Philpotts, A., & Ague, J. (2009). Principles of igneous and metamorphic petrology. Cambridge University Press.
• Shelley, D. (1993). Igneous and metamorphic rocks under the microscope: classification, textures, microstructures and mineral preferred-orientations.
• Vernon, R. H. & Clarke, G. L. (2008): Principles of Metamorphic Petrology. Cambridge University Press.
• Vernon, R. H. (2018). A practical guide to rock microstructure. Cambridge university press.


Photo
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Slender prisms of kornerupine (colorless) and sapphirine crystals from Fiskernaes, Greenland. PPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (colorless) and sapphirine crystals from Fiskernaes, Greenland. PPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (colorless) and sapphirine crystals from Fiskernaes, Greenland. PPL image, 2x (Field of view = 7mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 2x (Field of view = 7mm)
kornerupine(20).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(21).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(22).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(23).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
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Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
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Slender prisms of kornerupine (I order gray-yellow) muscovite, and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
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Slender prisms of kornerupine (colorless) and sapphirine crystals from Fiskernaes, Greenland. PPL image, 10x (Field of view = 2mm)
kornerupine(31).jpg

Slender prisms of kornerupine (I order gray-yellow) muscovite, and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(32).jpg

Slender prisms of kornerupine (colorless) and sapphirine crystals from Fiskernaes, Greenland. PPL image, 10x (Field of view = 2mm)
kornerupine(33).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(34).jpg

Slender prisms of kornerupine (colorless) and sapphirine crystals from Fiskernaes, Greenland. PPL image, 10x (Field of view = 2mm)
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Slender prisms of kornerupine (colorless) and sapphirine crystals from Fiskernaes, Greenland. PPL image, 10x (Field of view = 2mm)
kornerupine(37).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(38).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(39).jpg

Slender prisms of kornerupine (I order gray-yellow), muscovite, and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(41).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)
kornerupine(42).jpg

Slender prisms of kornerupine (I order gray-yellow) and sapphirine (gray) crystals from Fiskernaes, Greenland. XPL image, 10x (Field of view = 2mm)