2" Natural Gabbro Polished Palm Stone Mineral Calcium Plagioclase Madagascar

Location: Madagascar

Weight: 2.4 Ounces 

Dimensions: 2 Inches Long, 1.5 Inches Wide, 0.9 Inches Thick

The item pictured is the one you will receive. 

Gabbro is a dark-colored, coarse-grained intrusive igneous rock made mostly of minerals like plagioclase feldspar and pyroxene. It forms when magnesium and iron-rich magma cools slowly deep inside the Earth. Although gabbro shares a similar mineral makeup with basalt, its texture is much coarser because it cools at a slower rate, unlike the fine-grained basalt that forms quickly. This natural stone offers a unique texture that reflects its deep-earth origins.

Mineral Composition
The primary minerals found in gabbro include:

1. Plagioclase Feldspar: This is typically calcium-rich plagioclase, often in the form of labradorite or bytownite. Plagioclase makes up a significant portion of gabbro’s mineral content.

2. Pyroxene: The most common type is clinopyroxene, usually augite. Pyroxenes can also include orthopyroxene, particularly in specific varieties of gabbro.

3. Olivine: While not always present, olivine can be found in some types of gabbro, particularly those classified as olivine gabbros.

4. Accessory Minerals: Gabbro may also contain minor amounts of other minerals such as hornblende (in hornblende gabbros), biotite, magnetite, ilmenite, and apatite.

5. Quartz and Feldspathoids: In certain subtypes like quartz gabbros or foid-bearing gabbros, small amounts of quartz or feldspathoids may be present.