Blue Kyanite 5x10-20mm Top Drill Teeth - 15-16 InchKyanite often occurs as long, bladed, striated crystals, transparent or translucent with a pearly luster. An aluminum silicate mineral, it may appear in white, pink, yellow, orange, green, blue, gray and black. In addition to its value as a gemstone, Kyanite is also extremely useful in industrial applications due to its high heat resistance. It is often used in kiln furniture and foundry molds, as well as for brake shoes, grinding wheels and cutting

It often also occurs with colors of rust

as well as gray and white inclusions in marbled patterns

Turquoise is an ancient gemstone

It is extremely fracture to resistant and has been used for blades and other tools since Neolithic times

cacao de nance

See below for more information on the unique pattern

It's also known as Angelita and Angelite Quartz

Common Opals such as White African Opal are believed to provide gentle

Turquoise is one of the oldest known gemstones

any color of the rainbow

Obsidian is produced when lava erupts from a volcano and cools rapidly with minimal crystal growth

The presence of chromium is what gives a ruby its red color