Kyanite 3-5mm Graduated Faceted Rondelle - 15-16 Inch Color_Yellow Sonoran Mountain Turquoise is a

Sonoran Mountain Turquoise is a high-quality turquoise variety mined in Sonora

The different colored zones in the stone result from different oxidation states of iron

This turquoise is known for having a higher silica content than many other types

and in standard porcelain

Kyanite 3-5mm Graduated Faceted Rondelle - 15-16 Inch Color_Yellow Sonoran Mountain Turquoise is aKyanite 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