2.1" Natural Gabbro Polished Palm Stone Mineral Calcium Plagioclase Madagascar

Location: Madagascar

Weight: 2.3 Ounces 

Dimensions: 2.1 Inches Long, 1.5 Inches Wide, 0.7 Inches Thick

The item pictured is the one you will receive. 

Gabbro is a coarse-grained, dark-colored intrusive igneous rock primarily composed of minerals such as plagioclase feldspar and pyroxene. It forms from the slow cooling of magnesium-rich and iron-rich magma deep beneath the Earth’s surface. The mineral composition of gabbro is similar to that of basalt, but while basalt is fine-grained due to rapid cooling, gabbro exhibits a much coarser texture because it cools slowly.

Gabbro is a coarse-grained, intrusive igneous rock composed primarily of calcium-rich plagioclase feldspar (commonly labradorite) and pyroxene minerals like augite. This dark-colored rock typically contains accessory minerals including olivine, hornblende, and magnetite, with some varieties featuring quartz or feldspathoids. Formed through slow crystallization of magma deep beneath Earth's surface, gabbro displays a characteristic phaneritic texture that distinguishes it from its fine-grained volcanic counterpart, basalt. This specimen showcases the classic mineral composition and granular appearance that make gabbro an essential example of plutonic rock formations, ideal for geological study and educational collections.