You Searched For: Igneous+Rocks
55 results were found
Greenstone
/www.boreal.com/images/Greenstone.pdf
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Greenstone Type:
Metamorphic; regional. Texture/Appearance:
Fine-grained, massive or compact; generally non-schistose. Color:
Dark, green. Mineralogy/Chemistry:
Mainly composed of chlorite, actinolite, epidote...
Peridotite
/www.boreal.com/images/Peridotite.pdf
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Peridotite Type:
Igneous; intrusive. Texture/Appearance:
Medium to coarse-grained; massive, granular, sometimes porphyritic. Color:
Medium gray to greenish-gray. Mineralogy/Chemistry:
Ultramafic, with mafic minerals greate...
Element of Month Lithum Boreal v2
/www.boreal.com/images/Element%20of%20Month_Lithum_Boreal_v2.pdf
1
All About Elements: Lithium
https://boreal.com/store/
boreal.com | 800-387-9393 2 3
Fun Facts About… Lithium 1. Elemental Lithium can float in mineral oil!
2. Lithium was one of the elements produced during Big Bang Nucleosynthesis. The other tw...
Hornfels
/www.boreal.com/images/Hornfels.pdf
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Hornfels Type:
Metamorphic, regional. Texture/Appearance:
Homogeneous; dense, fine-grained. Granoblastic; may have porphyroblasts or any of the minerals present.
Color: Varies; light to dark. May be pink, brow...
Granite
/www.boreal.com/images/Granite.pdf
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Granite Type:
Igneous, intrusive. Texture/Appearance:
Massive, medium to coarse-grained; holocrystalline, sometimes porphyritic. Color:
White, light gray, pink, or red. Mineralogy/Chemistry:
Felsic; composed primarily of q...
Tuff
/www.boreal.com/images/Tuff.pdf
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Tuff Type:
Igneous; extrusive (pyroclastic). Texture/Appearance:
Clastic texture with angular rock and mineral fragments and lapilli mixed with fine-grained volcanic ash, partly cemented by sedimentary materia...
Marble
/www.boreal.com/images/Marble.pdf
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Marble Type:
Metamorphic; regional and contact. Texture/Appearance:
Fine to coarse-grained; granoblastic to saccharoidal. May appear patched or with streaks or banding that is deformed.
Color: Variable, commonly white, pin...
Hornblende
/www.boreal.com/images/Hornblende.pdf
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Hornblende (Ca,Na)2-3 (Mg,Fe,Al)5 SI6 (Si,Al)2 O22 (OH)2 (Amphibole Group) Crystallography:
Monoclinic: 2/m. Crystals prismatic usually terminated by {011}. May be columnar to fibrous; coarse-to fine-granular.
Physical Pro...
Element of Month Lithum Boreal
/www.boreal.com/images/Element%20of%20Month_Lithum_Boreal.pdf
1
All About Elements: Lithium
https://boreal.com/store/
boreal.com | 800-387-9393 2 3
Fun Facts About… Lithium 1. Elemental Lithium can float in mineral oil!
2. Lithium was one of the elements produced during Big Bang Nucleosynthesis. The other tw...
Topaz
/www.boreal.com/images/Topaz.pdf
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Topaz Al2SiO4 (F,OH)2 Crystallography:
Orthorhombic; 2/m2/m2/m. Crystals commonly prismatic with vertical prism faces often striated; also in crystalline masses or granular.
Physical Properties: Cleavage: {001} perfect. Fr...
Scoria
/www.boreal.com/images/Scoria.pdf
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Scoria Type:
Igneous; extrusive (volcanic). Texture/Appearance:
Fine-grained to glassy; highly vesicular (>50%). Usually heavier and more crystalline than pumice.
Color: Dark reddish-brown to black.
Mineralogy/Chemistry: B...
Pyrrhotite
/www.boreal.com/images/Pyrrhotite.pdf
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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 ...
Diabase
/www.boreal.com/images/Diabase.pdf
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Diabase Type:
Igneous; intrusive. Texture/Appearance:
Often porphyritic; characterized by an ophitic groundmass where intersecting plagioclase laths are partially or completely enclosed by pyroxene. Massive wi...
Ilmenite
/www.boreal.com/images/Ilmenite.pdf
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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 o...
Anorthite
/www.boreal.com/images/Anorthite.pdf
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Anorthite CaAl2Si2O8(An90-100) (Feldspar Group) (see also Plagioclase) Crystallography:
Triclinic; 1. Crystals usually prismatic parallel to c-axis; twinning as in albite. Commonly massive, cleavable, with gra...
Corundum
/www.boreal.com/images/Corundum.pdf
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Corundum Al2O3 Crystallography:
Hexagonal-R; 32/m. Crystals commonly tabular on {0001} or prismatic {1120}; often rude barrel-shaped crystals. Usually massive; coarse or fine granular.
Physical Properties: Cle...
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