igneous
Pink feldspar-bearing pegmatite
Orthoclase–microcline feldspar, chiefly KAlSi₃O₈, in a granitic pegmatite matrix
AI-generated identification · may be incorrectHardness about 6–6.5 Mohs; salmon-pink to cream, vitreous to pearly luster, blocky crystals, and prominent two-direction cleavage. The granular greenish-gray material may be quartz, mica, or alteration minerals.
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Physical properties
Hardness about 6–6.5 Mohs; salmon-pink to cream, vitreous to pearly luster, blocky crystals, and prominent two-direction cleavage. The granular greenish-gray material may be quartz, mica, or alteration minerals.
Formation & geological history
Likely formed as a coarse-grained igneous pegmatite from the final, water-rich melt of a granite intrusion, typically during Precambrian to Phanerozoic continental magmatism. Exact age and locality require laboratory or field context.
Uses & applications
Common feldspar is used in ceramics, glass, and fillers; attractive pieces are collected or cut as ornamental material. This specimen appears mainly of educational or modest collector interest.
Geological facts
Pink color commonly reflects trace iron in potassium feldspar. Pegmatites can host large crystals of quartz, tourmaline, beryl, and rare economic minerals.
Field identification & locations
Identify by its coarse texture, salmon-pink color, glassy cleavage faces, and lack of obvious rounded grains; a hardness test and streak/chemical examination help distinguish feldspar from calcite. Common in granite and pegmatite districts worldwide, including Maine, South Dakota, Brazil, Madagascar, and Scandinavia.
