2.1" Natural Gabbro Polished Palm Stone Mineral Calcium Plagioclase Madagascar

Location: Madagascar

Weight: 2.6 Ounces 

Dimensions: 2.1 Inches Long, 1.4 Inches Wide, 0.9 Inches Thick

The item pictured is the one you will receive. 

Gabbro
Gabbro is a dark, coarse-grained intrusive igneous rock formed from the slow cooling of magnesium- and iron-rich magma deep within the Earth’s crust. Its mineral composition, primarily plagioclase feldspar and pyroxene, is similar to basalt, but gabbro’s slow cooling produces a much coarser texture compared to the fine-grained basalt.

Mineral Composition of Gabbro

• Plagioclase Feldspar: Typically calcium-rich (labradorite or bytownite) and forms a major portion of gabbro’s mineral content.

• Pyroxene: Mainly clinopyroxene (usually augite); some varieties also contain orthopyroxene.

• Olivine: Present in certain types, especially olivine gabbros.

• Accessory Minerals: May include minor amounts of hornblende (in hornblende gabbros), biotite, magnetite, ilmenite, and apatite.

• Quartz and Feldspathoids: Found in small quantities in subtypes like quartz gabbros or foid-bearing gabbros.