Green Kyanite 9x13-12x16mm Top Drill Irregular Flat Drop - 15-16 Inch Stone Type_Dendritic Opal It is produced by certain

It is produced by certain molluscs as an inner shell layer

Topaz is a rare silicate mineral and obtains much of its popularity from its beautiful colors and its status as a birthstone

3x6mm Kinked Paperclip Cable Chain in Silver Plated Brass - 15 Foot Spool

Chiastolite is also known as the Cross Stone for the cross matrices of browns

Mixed Lodolite is Quartz with inclusions of sand

Green Kyanite 9x13-12x16mm Top Drill Irregular Flat Drop - 15-16 Inch Stone Type_Dendritic Opal It is produced by certainKyanite 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