Crushed Black Kyanite Powder from Brazil, Fine Crush (<0.25mm)

Kyanite is a fibrous metamorphic mineral that forms in distinctive thin blades and can come in a variety of colors, though the most common color is blue. This mineral only forms under high pressure within the Earth's crust, which can tell you A LOT about the tectonic history of an area. Because kyanite crystallizes as thin blades, it also crushes up into progressively smaller, elongate crystals during the crushing process. This black kyanite is from Brazil and is a great choice for your unique crystal projects. Our powdered material consists of mostly silt and clay sized particles. Our powders do have a slight grit to them. Please see the corresponding sediment size chart. Mineral Properties Mohs’s Hardness: 4.5 and 7 (dependent on crystal orientation) Specific Gravity (g/cm3): 3.5 - 3.7 Luster: Vitreous, Pearly Color: Black Origin: Brazil This product is not man-made, mixed with resin, dyed, or stabilized. Pictures are taken in full sun and material is dry. Size measurements are us