You Searched For: Rock Collections
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Diabase
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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...
Gneiss
/www.boreal.com/images/Gneiss.pdf
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Gneiss Type:
Metamorphic; regional. Texture/Appearance:
Foliated, often with distinct banding (segregation) of minerals; some preferred orientation in micas (platy) or hornblende (prismatic crystals). Medium t...
Hornblende
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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...
Amphibolite
/www.boreal.com/images/Amphibolite.pdf
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Amphibolite Type:
Metamorphic; regional. Texture/Appearance:
Massive to foliated; gneissic to schistose. Color:
Black to dark-green often speckled with white. Mineralogy/Chemistry:
Mafic; composed primarily of...
Dolostone
/www.boreal.com/images/Dolostone.pdf
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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: Li...
Element of Month Lithum Boreal v2
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1
All About Elements: Lithium
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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...
Opal
/www.boreal.com/images/Opal.pdf
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Opal SiO2 • nH2O Crystallography:
None, amorphous. Massive, often in rounded and botryoidal forms, sometimes pisolitic. Physical Properties:
Cleavage: None; conchoidal fracture. Hardness: 5.0-6.0. Specific Gravity: 2.0-2.2...
Field Equipment
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Field Equipment Clinometer and Measuring Tools Navigation Properties Testing Rock Hammers and Chisels Tools and Supplies
Diamond
/www.boreal.com/images/Diamond.pdf
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Diamond C Crystallography:
Isometric; 4/m32/m. Crystals usually octahedral, but can be cubic or dodecahedral; curved faces are frequently observed.
Physical Properties: Cleavage: {111} perfect; 4-cleavage directions. Fract...
Experience Science Olympiad at Home
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Experience Science Olympiad at Home With Elementary Science Olympiad Signature Kits Experience Science Olympiad at Home Exclusively available from Ward’s Science in partnership with Science Olympiad, Elementary Science Olympiad Signature Kits enco...
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...
Nepheline
/www.boreal.com/images/Nepheline.pdf
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Nepheline (Na,K) AlSiO4 Crystallography:
Hexagonal; 6. Rarely in small prismatic crystals with base; more commonly massive, compact, and in embedded grains.
Physical Properties: Cleavage: {1010} distinct. Frac...
Arkose
/www.boreal.com/images/Arkose.pdf
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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 redd...
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...
Geology Specimen Key Cards
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Geology Specimen Key Cards These helpful guides provide extensive background information for Ward’s Science rocks and minerals. Ideal for supplementing your lessons with additional facts and information, or perfect for take-home study or homework ...
Biotite
/www.boreal.com/images/Biotite.pdf
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Biotite K (Mg, Fe+2)3 (Al, Fe+3) Si3 O10 (OH,F)2 (Mica Group) Crystallography: Monoclinic; 2/m. Usually in irregular foliated masses, and rarely in tabular or short prismatic crystals. Physical Properties:
Cle...
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