You Searched For: Iron Standards

+ward’ssciencewardsci.com800-962-2660 Magnetite Fe+2Fe2+3O4 (Spinel Group) Crystallography: Isometric; 4/m32/m. Frequently in octahedral crystals; rarely dodecahedral. Commonly coarse-to fine-grained granular massive. Physical Properties: Cleavage...

wardsci.com 800-962-2660 Limonite FeO • OH • nH2O Crystallography: Not crystallized a mineral colloid. Usually stalactitic botryoidal or mammillary; also fibrous massive earthy. Physical Properties: Cleavage: None apparent. Hardness: 5.0-5.5. Spec...

+ward’ssciencewardsci.com800-962-2660 Goethite Fe+3 O (OH) (See also Limonite) Crystallography: Orthorhombic; 2/m2/m2/m. Acicular or rarely in distinct prismatic vertically striated crystals. Also massive reniform stalactitic or in radiating fibro...

wardsci.com 800-962-2660 Pyrrhotite Fe1-xS (x = 0 - 0.17) Crystallography: Monoclinic; 2/m (below about 250°C). Hexagonal; 6/m3/m2/m for high tempera- ture forms. Crystals rare usually tabular to platy on {0001}. Also massive granular. Physical Pr...

ward’s sciencewardsci.com800-962-2660 Hematite Fe2 O Crystallography: Hexagonal -R; 32/m. Crystals thick to thin tabular on {0001}; more rarely rhombohe- dral. Also micaceous to platy botryoidal to reniform and commonly earthy. Physical Properties...

wardsci.com 800-962-2660 Chromite Fe+2 Cr2 O4 (Spinel Group) Crystallography: Isometric; 4/m32/m. Habit octahedral but crystals small and rare; most often granular to compact; massive. Physical Properties: Cleavage: None. Fracture uneven; brittle....

+ward’ssciencewardsci.com800-962-2660 Schorl (Tourmaline Group) Na Fe3+2 Al6 (BO3)3 Si6 O18 (OH)4 Crystallography: Hexagonal -R; 3m. Usually in prismatic crystals with rounded triangular cross- section due to prominent trigonal prism and subordina...

wardsci.com 800-962-2660 Sphalerite (ZnFe) S Crystallography: Isometric; 43m. Crystals usually tetrahedral or dodecahedral and often distorted and complex; rough curved faces common. Usually in cleavable masses coarse to fine granular. Physical Pr...

+ward’ssciencewardsci.com800-962-2660 Ilmenite Fe+2 Ti O3 Crystallography: Hexagonal-R; 3. Crystals usually thick tabular with prominent basal planes and small rhombohedral truncations. Commonly in thin plates massive or compact; also in grains or...

+ward’ssciencewardsci.com800-962-2660 Pyrite Fe S2 Crystallography: Isometric; 2/m3. Crystals commonly cubic (often striated) also pyritohedral or octahedral. Frequently massive granular sometimes globular reniform radiated. Physical Properties: C...

wardsci.com 800-962-2660 Serpentinite Type: Metamorphic; regional. Texture/Appearance: Fine to coarse-grained lamellar or mesh-like; massive with frequent zonations and veins. Color: Dark green to black. Mineralogy/Chemistry: Ultramafic; composed ...

+ward’ssciencewardsci.com800-962-2660 Skarn Type: Metamorphic; contact. Texture/Appearance: Most often coarse-grained and granoblastic with no foliation. Massive structure with zones of mineral concentration. Color: Varies with mineralogy but usua...

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wardsci.com 800-962-2660 Dolostone Type: Sedimentary chemical. Texture/Appearance: Fine to coarsely crystalline grain size; sugary (saccharoidal). May contain various fossil relicts molds and casts. Stratification absent or irregular. Color: Light...

Andradite Ca3Fe2+3 (SiO4)3 (Garnet Group) Crystallography: Isometric; 4/m32/m. Common forms are dodecahedron and trapezohedron often in combination. Also massive granular. Physical Properties: Cleavage: None; parting sometimes distinct. Fracture s...

+ward’ssciencewardsci.com800-962-2660 Arkose Type: Sedimentary; clastic. Texture/Appearance: Usually coarse-grained sometimes with pebbles. Angular to subangular poorly to moderately well-sorted sand grains. No Fossils. Color: Gray pink or reddish...