Blue Hackmanite 8mm Round - 15-16 Inch Malachite It was named from the

It was named from the Latin "Thule" - which was a term used by ancient Greeks and Romans to refer to the then-little-known lands to the north or present day Scandinavia

improving concentration

A variety of Andalusite

They are all silicate minerals

and crystal formations on the collars are natural and unenhanced in any way

Blue Hackmanite 8mm Round - 15-16 Inch Malachite It was named from theDiscovered 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.