Pink Granite

Physical Properties

Hardness: 6-7 on Mohs scale. Color: Pink, reddish, or salmon hues with inclusions of grey and black. Luster: Dull to vitreous. Structure: Phaneritic (coarse-grained) crystalline. Specific Gravity: 2.63 - 2.75.

Formation & Geological History

Formed through the slow crystallization of magma below the Earth's surface (intrusive). Composed primarily of potassium feldspar (orthoclase), quartz, and mica. This specimen likely originates from a continental shield environment and can be hundreds of millions of years old.

Uses & Applications

Used widely in construction for countertops, floor tiles, and paving stones. Commonly used in monuments and gravestones due to its durability and aesthetic appeal.

Geological Facts

The pink color is specifically due to a high concentration of potassium feldspar. If the rock contains more than 20% quartz by volume, it is officially classified as granite. It is one of the most common rocks in the Earth's continental crust.

Field Identification & Locations

Identify in the field by looking for a 'salt and pepper' or speckled texture where the individual mineral grains can be seen with the naked eye. It is commonly found in mountainous regions or areas where ancient crust is exposed, such as the Llano Uplift in Texas or the Scottish Highlands.

Identified on: 4/30/2026

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