Indigo Gabbro Sphere

Gabbro refers to a group of coarse-grained igneous rock made mainly of Quartz and Feldspar. Indigo Gabbro is also known by the trade name Mystic Merlinite (not to be confused with Merlinite, which is a trade name for Dendritic Opal). This variety of Gabbro can be found in Madagascar and Alaska.