Kyanite 2-3x3-4mm Faceted Rondelle - 15-16 Inch high-end-discount Sonora Jasper is the trade

Sonora Jasper is the trade name for Sonora Dendritic

Mohs Hardness: 6-6

Red Agate is a form of Chalcedony

The crystal naturally forms with 18 facets

who used it extensively in their jewelry

Kyanite 2-3x3-4mm Faceted Rondelle - 15-16 Inch high-end-discount Sonora Jasper is the tradeKyanite 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