BH250-96
Title
BH250-96
Subject
Pink Granite
Description
Major Minerals: orthoclase, quartz
Minor Minerals: chlorite, oxides, perthite, microcline, zircon, monazite
Mineralogy Comments: perthitic
Optics/Texture: plagioclase feldspar show sign of defromation with a kink texture, quartz shows strong andulouse (wavy extitions). Some of the biotite show green pleochroism. Greenish pleochroism often reflects intermediate composition, with moderate Fe³⁺/Mg²⁺ ratios.
Minor Minerals: chlorite, oxides, perthite, microcline, zircon, monazite
Mineralogy Comments: perthitic
Optics/Texture: plagioclase feldspar show sign of defromation with a kink texture, quartz shows strong andulouse (wavy extitions). Some of the biotite show green pleochroism. Greenish pleochroism often reflects intermediate composition, with moderate Fe³⁺/Mg²⁺ ratios.
Creator
Bereket Haileab
Source
From the rock collection of Bereket Haileab. Sample BH250-96. Housed at Carleton College in Minnesota.
Type
Thin section and hand sample
Relation
Collection
Citation
Bereket Haileab, “BH250-96,” BH250 Mineralogy Teaching Collection, accessed April 26, 2026, https://bereket-haileab.geology.sites.carleton.edu/items/show/109.