Blue Kyanite 10mm Round - 15-16 Inch R1851 Obsidian is produced when lava

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

It is said to bring strength

creating a beautiful blend of pink and green in mottled patterns

It's actually a pink variety of Beryl -- the family of gemstones that also includes Aquamarine

It is transparent or translucent

Blue Kyanite 10mm Round - 15-16 Inch R1851 Obsidian is produced when lavaKyanite 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