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Osumilite-(Mg)

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ZLT925581

Osumilite-(Mg)

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Description
Locality: 
Caspar Quarry, Bellerberg, Ettringen, Eifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 2 × 1.4 cm
Description

 Osumilite-(Mg) is a strongly dichroitic mineral with a blue colour in direction of the c-axis and yellow in the direction of the a axis perpendicular to it. Most the blue hue dominates but some more prismatic crystals show a yellow hue as in this case. Xenolith matrix. FOV 1.3 mm.

POD.

Mineral Data
What's on the rock

Osumilite-(Mg)

Formula: 
KMg2Al3(Al2Si10)O30
Strunz: 
9.CM.05
Hardness: 
5.0 - 6.0
Type Locality: 
Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany

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