Blue Hackmanite 6mm Round - 15-16 Inch featured_08012024 giving some rubies a slightly

giving some rubies a slightly brownish or purplish tint

with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns

manganese and other metallic oxides captured during the forming of the rock

It is the most abundant lithium-bearing mineral as well as a significant source of the rare alkali metals rubidium and caesium

one of the first fluorescent minerals ever studied

Blue Hackmanite 6mm Round - 15-16 Inch featured_08012024 giving some rubies a slightlyDiscovered 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.