$44.00
& FREE ShippingThis beautiful Blue Kyanite specimen features shimmering blades enveloping an inner filling of quartz, truly displaying its protective and embracing qualities. It has a naturally flattened bottom, providing excellent stability for display.
Stone of Attunement
						
                           
                          Category:
			
						
						Nesosilicate
                          
                           
                           
                           
                          Chemical Formula:
			Al2SiO5
                          
                           
                           
                           
                          Crystal Class:
			
						
						Pinacoidal
                          
                           
                           
                           
                          Crystal System:
			
						
						Triclinic
                          
                           
                           
                           
                          Name:
			Kyanite
                          
                           
                           
                           
                          Space Group:
			P1
                          
                           
                           
                           
                          Strunz Classification:
			9.AF.15
                          
                           
                           
                           
                          Unit Cell:
			a = 7.1262(12) Åb = 7.852(10) Åc = 5.5724(10) Åα = 89.99(2)°, β = 101.11(2)°γ = 106.03(1)°; Z = 4
                          
                           
                                                      
                        
                           
                           Cleavage: [100] perfect [010] imperfect with 79° angle between
                           
                           Crystal Habit: Columnar, Fibrous, Bladed
                           
                           Diaphaneity: Transparent to translucent
                           
                           Fracture: Splintery
                           
                           Luster: Vitreous
                           
                           Optical Properties: Biaxial (-)
                           
                           Pleochroism: Trichroic
                           
                           Refractive Index: nα = 1.712 - 1.718 nβ = 1.720 - 1.725 nγ = 1.727 - 1.734
                           
                           Specific Gravity: 3.67
                           
                           Streak: White
                           
                           Tenacity: Brittle
                           
                           Twinning: Lamellar on {100}
                           
                        
The Universal Crystal
						
                           
                          Category:
			
						
						Silicate Mineral
                          
                           
                           
                           
                          Chemical Formula:
			SiO2
                          
                           
                           
                           
                          Crystal Class:
			
						
						α-Quartz: Trapezohedral; β-Quartz: Trapezohedral (Class 6 2 2)
                          
                           
                           
                           
                          Crystal System:
			
						
						α-Quartz: Trigonal; β-Quartz: Hexagonal
                          
                           
                           
                           
                          Dana Classification:
			75.01.03.01 (Tectosilicates)
                          
                           
                           
                           
                          Name:
			Quartz
                          
                           
                           
                           
                          Space Group:
			α-Quartz: P3221 (no. 154), β-Quartz: P6222 (no. 180)
                          
                           
                           
                           
                          Strunz Classification:
			4.DA.05 (Oxides)
                          
                           
                           
                           
                          Synonym:
			Agate, Amethyst, Aventurine, Carnelian, Cat's Eye, Chalcedony, Chert, Chrysoprase, Citrine, Flint, Hornstone, Jasper, Moss Agate, Plasma, Prase, Rock Crystal, Rose Quartz, Sapphire Quartz, Smoky Quartz, Tigers Eye
                          
                           
                           
                           
                          Unit Cell:
			a = 4.9133 Å, c = 5.4053 Å; Z=3
                          
                           
                                                      
                        
                           
                           Birefringence: +0.009 (B-G interval)
                           
                           Cleavage: {0110} Indistinct
                           
                           Common Colors: Colorless, Various depending on inclusions
                           
                           Crystal Habit: 6-Sided Prism, Hexagonal Terminations, Drusy, Massive, Microcrystalline
                           
                           Diaphaneity: Transparent to Opaque
                           
                           Formula Mass: 60.083 g·mol−1
                           
                           Fracture: Conchoidal
                           
                           Luster: Vitreous to dull
                           
                           Melting Point: 1670 °C
                           
                           Mohs Hardness: 7
                           
                           Optical Properties: Uniaxial (+)
                           
                           Pleochroism: None
                           
                           Refractive Index: nω = 1.543–1.545, nε = 1.552–1.554
                           
                           Specific Gravity: 2.65
                           
                           Streak: White
                           
                           Tenacity: Brittle