Blue Hackmanite 8mm Round - 15-16 Inch 14-Mar they come in a rainbow

they come in a rainbow of colors besides red

meaning it forms by replacing another mineral’s crystal structure atom by atom with its own crystal structure

It occurs with wave-like bands of charcoal gray

peach or light red and may also include colorless Quartz

Blue Hackmanite 8mm Round - 15-16 Inch 14-Mar they come in a rainbowDiscovered in Greenland in the late 1890's, hackmanite is named for Finnish geologist Victor Hackman. It is a rare occurrence to find gem grade hackmanite; at best, most crystals are translucent. Hackmanite is the light pink to pale violet variety of sodalite. It is a particularly unusual gem because it exhibits a special optical property known as "tenebrescence," a type of reversible photochromism. Hackmanite is very reactive under UV light.