Indigo Gabbro is a color variant of the mineral Gabbro. It is an extremely deep midnight blue (sometimes very dark violet) which tends to look black until it is looked at in the very brightest of sunlight. It is a relatively new crystal that surfaced in the last few years. There are many different looks to this intricate stone which is a mix of minerals, including chlorite, muscovite, serpentine, feldspar, olivine, magnetite and several other lesser known minerals and metals elements which form in a dark grey (charcoal) to back matrix. Much of our planet's deep oceanic crust is made from Gabbro, which forms when magma (lava) cools into interlacing crystals that are oriented in a haphazard manner. Occasionally it forms in oranges and browns, and light to dark olive greens, with indigo being the most rare. Gabbro stones have occasional spots of chatoyancy due to its Feldspar content. Gabbro is found in many places on Earth like India, Germany, Brazil, Madagascar, Alaska, South Africa, Greenland, Turkey, Italy, Greece and many others. (Miriam's Indigo Gabbro collection is from Brazil.) The term, Gabbro, was named after a town in the Italian Tuscany region by the German geologist Christian Leopold von Buch. Metaphysical essence: Powerful and dignified, integrity, and deep sincerity, and a balance between positive and negative thinking. It’s nickname is Merlin stone or merlinite.