On cut or polished stones
Green Aventurine is a green translucent quartz with glimmering metallic inclusions
and much of the black Onyx on the market has been artificially colored
Seraphinite's chatoyancy (optical reflectance) gives it a feathery appearance associated with angels (also known as seraphim
The deposits within the rock become Turquoise after a chemical reaction occurs over long periods of time
Kyanite Multi 4mm Round - 15-16 Inch july_carnelian On cut or polished stonesKyanite 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