Indigo Gabbro
Mystic Merlinite (Igneous rock composed primarily of Feldspar, Quartz, and dark minerals) · Decorative Stone / Semi-Precious Gemstone
Crystal System
Varies by constituent minerals (Triclinic/Monoclinic for feldspars, Orthorhombic/Monoclinic for mafic minerals); massive or tumbled habit
Mineral Group
Silicates (Igneous rock mixture)
Chemical Formula
Complex silicate rock containing Plagioclase Feldspar, Pyroxene, Amphibole, Quartz, and accessory minerals
Formation Process
Igneous intrusion, formed by the slow cooling of molten magma beneath the Earth's crust
About This Crystal
A tumbled, polished stone displaying a moody color palette of deep indigo, slate grey, and black, accented by subtle hints of yellowish or golden undertones and mottled patterns throughout.
Physical Characteristics
Grey to black body color with white streak, uneven to conchoidal fracture, specific gravity around 2.7-3.0, opaque transparency with a vitreous to waxy polish
Optical Properties
Aggregated optical properties due to multiple mineral phases; generally doubly refractive for individual transparent crystal grains, but opaque as a bulk rock
Hardness & Durability
Origin Region
Madagascar, USA, and various other intrusive igneous formations worldwide
Hardness & Durability
Mohs hardness typically 6 to 6.5, moderate toughness, suitable for general jewelry use with standard care
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemicals, ultrasonic cleaners, and prolonged exposure to direct sunlight
Rarity & Value
Common to uncommon, highly valued for decorative and metaphysical carving purposes with affordable pricing
Special Characteristics
Striking contrasting patterns of dark dendritic or crystalline inclusions against a bluish-grey background, highly sought after in holistic practices
Lore & History
Often traded under the commercial name Mystic Merlinite, it is associated with intuition, deep spiritual insight, and balancing light and shadow energies within the body