Ganophyllite

Ganophyllite is a rare micaceous mineral which can form some interesting mineral specimens.

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Information about Ganophyllite

Ganophyllite is a rare and visually subtle mineral, typically forming thin, micaceous flakes or platy aggregates in shades of brown, reddish-brown, orange-brown, or yellowish.


Uses and History

Due to its rarity and delicate form, ganophyllite has no industrial or commercial uses. Its primary value lies in mineralogical collections.

Ganophyllite was named in 1890 by Axel Hamberg for the Greek words γανωμα (brilliance) and φύλλον (leaf), for its luster on the micaceous areas.

Its type locality is Harstigen Mine, Sweden.

 


Mineralogy

Chemistry
Hydrous manganese calcium silicate with the formula (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O.
Colours and Variations

Light brown, pink-brown, pale pink

Streak
Brownish yellow
Luster
Vitreous
Transparency
Transparent, translucent
Fracture
Transparent, translucent
Crystal habit
Foliated, micaceous
Mohs hardness
4.0 – 4.5
Fluorescence
Specific Gravity
2.77 – 2.84
Easiest testing method

Hazards and Warnings

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.

Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis. When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.

 


Translations

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English:

  • Ganophyllite

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Russian:

  • Ганофиллит

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  • Ganophyllit

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  • Ganophyllit

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Mandarin Chinese:

  • 辉叶石

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Further Reading / External Links