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Biotite Var Rubellan

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LGM181028

Biotite Var Rubellan

Ex Dr. Krantz, Bonn, Germany
With Antique Label

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Description Tabs

Description
Locality: 
Laacher See, Glees, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 6.5 × 2.5 cm
Largest Crystal: 
2.50cm
Weight: 
145.00gr
Description

Rubellan is a red-colored, oxidized variety of biotite. Here are tabular rubellane crystals, up to 2.5 cm, and black pyroxenes embedded in leucite-nephelinite-lava. A good and rare eifel mountains volcanism specimen. Comes with antique label dated 1899 and corresponding number sticker on-glued on the specimen.
The label in old Sütterlin script means: "Rubellan - Laacher See Eifel - Durch H2O Aufnahme umgewandelter Magnesiaglimmer, von Biotit nur durch die Farbe unterschieden." (Rubellan - Laach lake Eifel mountains - magnesia mica [german synonym for phlogophite] altered by incorporation of H2O, to be distinguished from biotite only by the color).

Mineral Data
What's on the rock

Biotite

Group Parent: 
Mica Group

Rubellan

Variety Of: 

Biotite

Hardness: 
0.0

Seller Information

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