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Graphic Granite

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PDM998139

Graphic Granite

Description Tabs

Description
Locality: 
Iveland, Agder, Norway
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.9 × 4.9 × 0.6 cm
Weight: 
50.00gr
Description

Slab of a big pink microcline crystal from Norway that includes the characteristic distribution of distinctive grey quartz inside, of repetitive cuneiform pattern, that form the so called graphic texture. No damages, polished at one side. The graphic texture is commonly created by exsolution and devitrification and immiscibility processes in igneous rocks. It is called 'graphic' because the exsolved or devitrified minerals form lines and shapes which are reminiscent of writing (Fenn, 1986).

Acquired in 1977 from J. Sibtsen. Ex Wilfred Moorer (1945-2015) #2523.

Combine specimens to reduce shipping costs!.

 

Fenn, P.M., (1986). On the origin of graphic granite. American Mineralogist, 71, 325-330 pp.

Free available online.

Mineral Data
What's on the rock

Graphic Granite

Mixture Of: 

Feldspar Group

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0

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