The two most popular classes of Australian Opal are Black Opal mined in Lightning Ridge and Fire Opal
Yellow Opal does not display the changeable flash of internal luster that other opals are known for
it is made up of volcanic glass
Porcelain Jasper is a brecciated (broken) Jasper originally found on a gold claim high in the Sierra Madre mountains of Mexico
Kyanite Multi 8mm Round - 15-16 Inch Size_5x8m The two most popular classesKyanite 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