Kyanite 2-3x3-4mm Faceted Rondelle - 15-16 Inch high-end-discount Red Agate is a form

Red Agate is a form of Chalcedony

Sonora Jasper is the trade name for Sonora Dendritic

who used it extensively in their jewelry

Black Spinel not only has the dark color

Porcelain Agate is a natural agate that is dyed and heated to give it the unique blue/white color and pattern that resembles porcelain

Kyanite 2-3x3-4mm Faceted Rondelle - 15-16 Inch high-end-discount Red Agate is a formKyanite 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