Product Overview
Gabbro is formed within magma chambers, deep within the earth. The chambers hold iron-rich rock melt, too heavy to reach the surface. As the melt cools, olivine and plagioclase feldspar forms. A great example of phaneritic mafic rock. Useful for exercises in identification and classification of igneous rocks. While each specimen will vary slightly in shape, size and color, it will measure approximately 3" in length. Each is individually packaged, labeled & barcoded for easy identification and storage.
