mineral

Pink Feldspar

Potassium Feldspar (KAlSi3O8)

Hardness: 6 (Mohs scale), Color: Pink/Salmon, Luster: Vitreous to pearly, Crystal structure: Monoclinic or Triclinic, Cleavage: Two directions at nearly 90 degrees, Specific Gravity: 2.5-2.6

Identified July 4, 2026More mineral →

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Physical properties

Hardness: 6 (Mohs scale), Color: Pink/Salmon, Luster: Vitreous to pearly, Crystal structure: Monoclinic or Triclinic, Cleavage: Two directions at nearly 90 degrees, Specific Gravity: 2.5-2.6

Formation & geological history

Commonly forms in igneous rocks like granite and pegmatites, as well as metamorphic rocks. It crystallizes from cooling magma or during the metamorphism of pre-existing rocks.

Uses & applications

Used extensively in the glass and ceramics industry as a flux to lower melting temperatures, and sometimes as a decorative stone in architecture and lapidary.

Geological facts

Feldspar is the most abundant group of minerals in the Earth's crust. Common varieties include orthoclase, microcline, and sanidine.

Field identification & locations

Identified in the field by its distinct pink color, pearly luster on flat cleavage surfaces, and hardness which allows it to scratch glass but be scratched by quartz. Found globally in granitic terrains.