| | Description | |
| Comments: | large crystals up usually with developed cystal faces (up to 6 m in length)separated by masses of quartz. The largest crystals found weighed more than 100 tons. | | Habit: | large crystals usually with developed cystal faces separeted by masses of quartz | | Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Bjørlykke, H.( 1934): The Mineral Paragenesis and Classification of the Granite Pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift 14, 211-311 | | Data | |
| Mineral Data: | Click here to view Microcline data | | Locality Data: | Click here to view Tveit 3 Feldspar Quarry (Steli; Steeli), Tveit, Iveland, Aust-Agder, Norway |
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