Click to Find Other Rocks, Fossils & Minerals Items Clear Blue Dumortierite Point Natural Quartz Crystal Stick Sparkling Mineral Collectible Gemstone Cab - Brazil You will receive exactly this Clear Blue Dumortierite Quartz Point (see photo, the photos are taken under bright light, stand not included)! Dumortierite is a boro-silicate mineral that is used as a popular ornamental stone. It has a deep violet to blue color that is very attractive and unusual. Although it is not used as a gemstone due to a lack of clarity, it does have good hardness and a bright color. A variety of quartz called dumortierite quartz is massive quartz colored blue by included crystals of dumortierite. Dumortierite can be misidentified as other ornamental stones such as sodalite, lazurite and lazulite. Dumortierite was named after French paleontologist E. Dumortier. Dumortierite is a relatively hard stone, and its prismatic crystals are most often smaller than 1 mm in size. Dumortierite rates a 7 on the hardness scale, has a vitreous luster, and displays strong pleochroism. This lack of transparency is a result of the fact that it has only one distinct cleavage and an uneven fracture. Chemical Formula: AlAl6O3BSi3O18; Hardness: 7; Color: Blue, Pink, Purple; Mineral Class: Dumortierite; As a rule, it crystallizes in orthorhombic (quasi-hexagonal) system forming radiative, massive and fibrous aggregates of prismatic crystals. Typically it occurs in coarse-grained acid igneous rocks or in pegmatite veins. Depending on the trivalent element in the chemical structure of the mineral, the color of the stone can vary from dark blue to violet blue or even red-brown. Properties for Stone:DumortieritePrimary Chakra:Throat ChakraCrystal System:Orthorhombic Crystal SystemChemical Composition:(Al7O3)(BO3)(SiO4)3_Aluminum_Borosilicate_HydroxideAstrological Sign:LeoNumerical Vibration:Number 4 Hardness:7 HardnessLocation:Madagascar, Austria, Brazil, Canada, France, Italy, Namibia, Nevada, Norway, Poland, Russia and Sri LankaRarity:CommonPronunciation:duh-MOOR-ter-ite / doo-MORE-teer-iteMineral Class:Silicates Mineral Class (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.) Our aim is to provide the best service to our clients. 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