CHRYSTOPHASE

 

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Named from the Greek 'micros' meaning 'small' and 'kleinen' meaning 'to incline'. This refers to the small deviations in its intersecting right - angle cleavage.

Microcline is one of the potassium - bearing feldspars and occurs as white to cream - coloured crystals. It can occur as very large crystals and masses in pregmatites where it is often mined for use in the ceramic and paint industries. A variety of microcline known as amazonite has a beautiful green coloration.

Occurrence.

Microcline is a widespread and common mineral of acidic plutonic rocks, such as pegmatites and granite, as well as syenite.

 

TECHNICAL DETAILS

Chemical Composition and Name Silicate
Crystalline System  5.5 to 6.5
Refractive Index Triclinic
Hardness 6 - 6.5
Specific Gravity  2.55 - 2.63
Streak White
Lustre

 

Vitreous, Pearly

 

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