Natural Larvikite Egg Polished Sparkling Symbiotic Black Moonstone w/ Labradorite Gemstone Crystal Mineral Specimen - India + Stand You will receive exactly this Larvikite Egg (see photo, the photos are taken under bright light, stand included)! Name after the town of Larvik in Norway, where it was first found. Larvikite is a variety of augite syenite or monzonite consisting of rhomb-shaped ternary feldspars (with a distinctive schiller), barkevikite, titanian augite and lepidomelane. These feldspars are known as ternary because they contain significant components of all three endmember feldspars. Due to its geochemical characteristics and its chemical composition (it contains Ca,NA and K) the so-called 'ternary' feldspar it is believed to have formed at around 30km, close the the boundary between the crust and the mantle. Larvikite is comprised nearly entirely of feldspar, and it is the special effect of the feldspar crystals that give it its blue color. This effect is called the "Schiller effect". Larvikite has many other names like Pearlspar, Blue Pearl, Black Moonstone with Black Labradorite e.t. Mohs Hardness: 6 to 6.5; Colour: Bluish grey with two more-or-less distinct colour varieties, one light bluish grey, the other dark bluish grey with golden brown overtones. (The above information is provided solely for informational purpose. Kindly note that all stones are offered for decorative purposes only. Please, handle your stones with great care, do not grind or crumble them, do not dip or add them into your food or drink, do not use any parts of them in any elixirs, potions, lotions etc. Always make sure you wash your hands before and after working with your crystals.)