Hematite White Silver 2x4mm Corner Cut Nugget - 15-16 Inch Stone Type_Calcite Indigo gabbro is a color

Indigo gabbro is a color variant of the igneous mineral

and this phenomenon is thought to be due to impurities of yttrium or organic matter within the crystal lattice

and originally came from much farther away

its coloring is the result of the chemical reaction that occurs when copper is introduced to water

Specialists soak the stones in resin or liquid plastic to help harden them

Hematite White Silver 2x4mm Corner Cut Nugget - 15-16 Inch Stone Type_Calcite Indigo gabbro is a colorHematite is an iron oxide and one of the few gemstones with a metallic luster. When tumbled it can have the look of polished steel. Hematite is black to steel to gray or silver to gray, as well as brown to reddish brown or red in color. Its name is derived from the Greek word for blood, haima, owing to its red appearance when sliced thinly or powdered.