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How To Identify Minerals: quartzlisation Form Page 1 of 1 Kids Habitat SDNHM domicile Visitor Information Introduction Color Streak Transp atomic number 18ncy glimmer Hardness Cleavage Fracture Specific Gravity Crystal Form Mineral Matters Regional Minerals Crystal Form Minerals grow in specific shapes, and commonly crystallize into one of si x crystal systems. The axes of the cr ystal, the angles at which the axes intersect, and the degree of s ymmetry defi ne each system. l Isometric -- Also called the cubic crystal system. Crystals be usually shaped standardized blocks, with similar and symmetrical faces. The crystal has three axes of symmetry, all at decently angles to each opposite, and al l of the alike(p) length. Example: pyrite. Tetragonal -- Typically, the crystals are shaped like four-sided prisms and pyramids. Each crystal has three ax es, all perpendicular to one another. twain axes are the comparable length and l ie on a naiant plane. The third axis is not the same length and i s at a right(a) angle to the other two. Example: zircon. Hexagonal -- These crystals are usually shaped like six-sided prisms or pyramids. Each crystal has four axes of symmetry. Three double-dealing in the same plane, are the same l ength, and i ntersect at 120° angl es. The fourth axis is not the same length, and i s perpendi cular to other three. Example: beryl.

Orthorhombi c -- These crystals are short and s tubby. Each crystal has three incommensurate axes, all at right angles to one another. Example: sunburn Monoclinic -- Crystals are short and stubby with tilted faces at each end. Each crystal has three unequal axes. Two axes lie in the same plane at right angles to each other. The thi rd axis is inclined. Example: gypsum. Triclinic -- Crystals are usually flat with sharp edges, but exhi bit no right angles. Each crystal has three unequal axes. None are perpendicular to one another. Example: feldspar. l l l l l Mineral Matters | Kids Habitat © San Diego Natural explanation Museum... If you want to get a full essay, order it on our website: Ordercustompaper.com

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