Larvikite AA Quality Tumbles

You will receive ONE random tumble. Size will vary on tumbles - average size is around 1.05" x .75" x .065 Larvikite is named after the town of Larvik in Norway, where this type of igneous rock is found. Larvikite is a relatively coarse-grained anorthoclase-rich igneous rock (magmatic rock type), that is formed at depth, about 30 kilometers deep. Far below the surface the magma cooled and hardened as large crystals formed. The color of the stone can vary between light gray and quite dark gray, nearly black. The presence of the alternating alkali feldspar and plagioclase layers give characteristic silver/ blue sheen (Schiller "twinkle" effect) on polished surfaces. This stone is sometimes known as Blue Granite, Birds Eye granite, Norwegian Pearl granite, Royal Blue Pearl granite.