History of Indigo Gabbro

Indigo Gabbro is a relatively “new” stone on the market and was not included any ancient or medieval lapidaries, texts which describe gemstones and their powers.  In modern lapidaries, there is often some confusion about which stone is being described since there are several commercial names associated with this stone, including: Black Granite, Blizzard Stone and Mystic Merlinite.

Indigo Gabbro is a form of Gabbro, a common dark-colored, coarse-grained igneous rock.  Gabbro is relatively easy to polish and is resistant to weathering and wear.  It is sometimes called “Black Granite” by manufacturers and merchants who sell ‘granite’ counter-tops, floor tiles, and even graveyard headstones.  Granite is a closely related igneous rock, but is typically white, pink or grey.

Most Gabbro is darkly colored, but one deposit found in Madagascar has a striking balance of black and a purple/blue/grey.  Gabbro from this deposit is properly known as “Indigo Gabbro.”  Commercial marketers also sometimes sell this stone as “Mystic Merlinite”.  This is not to be confused with regular “Merlinite” which is found in New Mexico, USA and is a white agate with black Maganese, sometimes with sparkly druzy crystals.  Merlinite is more properly called “White Dendritic Agate”

Another rare form of Gabbro is called “Blizzard Stone” and it is found only in Alaska. However, Indigo Gabbro from Madgascar and Blizzard Stone from Alaska are often confused.  Simply put, both stones are Gabbros, but Blizzard Stone is black and white, while Indigo Gabbro is black and purple/blue.