Results 1 - 10 for Conchoidal fracture

Stone Age Tools in a Modern Society
... Quartzite (metamorphosed quartz sandstone) Obsidian (volcanic glass) All are made of silica (in pure form, lacking mineral cleavage) and have a conchoidal fracture.
http://instruct.uwo.ca/earth-sci/088f/stoneagetools.pdf
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GEOLOGICAL BACKGROUND
Cleavage :indistinct Fracture : uneven, small conchoidal, brittle Crystal system :(Trigonal ) long crystals with triangular cross section around sides,definite striation parallel to ...
http://www.unido-aaitpc.org/unido-aaitpc/new1/mozambique/Gemstones.pdf
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Draft Environmental Impact Statement for the Mesaba Energy Project
... CRONYMS AND G LOSSARY A-2 Acronym or Term Definition amsl above mean sea level anthracite The hardest type of coal, characteristically black in color, lustrous, with a conchoidal fracture ...
http://gc.energy.gov/NEPA/nepa_documents/docs/deis/eis0382D/acronyms.pdf
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Stone Knapping: Characterizing the Skills Involved
In effect, given that for all stone-knapping techniques, the stable parameters of conchoidal fracture must be controlled, we can assume then that similar skills are involved.
http://ehess.modelisationsavoirs.fr/seminaire/seminaire08-09/10-13mai09-BBril/04Chapter_Bril%20et%20al.pdf
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Comparison of Diamond and Simulated Diamond Gemstones
... fracture=uneven to conchoidal transparent d = 0.020 amethyst purple d = 0.013 cairngorm (smoky quartz) smoky brown citrine yellow rock crystal colorless rose quartz pink conchoidal fracture ...
http://cameo.mfa.org/dynamic/downloads/download_file_464.pdf
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Igneous, Sedimentary, and Metamorphic Rock ID Charts Some Common Rock ...
(breaks along planes? ) Color Other Properties MINERAL NAME Harder No variable glassy luster; conchoidal fracture (breaks like glass) QUARTZ Harder Yes peach/pink to white glassy luster; banding; 2 ...
http://scidiv.bellevuecollege.edu/gj/REVDMineral-RockID(OlyPen).pdf
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Mineral Identification
Can often be recognized by conchoidal fracture and waxy luster . • Fibrous (or acicular) - mass of long thin crystals which may be parallel, radiating, or crisscrossing.
http://pasadena.wr.usgs.gov/office/given/geo1/pdfs/GEO1_MINIDTABLE.pdf
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Classification of Sedimentary Rocks
... of microscopic organisms, clay--soft CHALK Banded Calcite TRAVERTINE Textural variets similar to limestone Dolomite (Ca Mg (CO 3) 2) DOLOMITE Cryptocrystalline, dense, conchoidal fracture ...
http://www.lnhs.org/hayhurst/geology/sedimentary_classificaiton_chart.pdf
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INFORMATION HANDOUT
... basal cleavage occurs in large flexible plates used as an insulator in electrical equipment and as a lubricant olivine ((Mg,Fe) 2 SiO 4 ) olive, green none conchoidal fracture used as ...
http://elibrary.sd71.bc.ca/subject_resources/science/7_support_files/chapter_7/mineral_identification_chart.pdf
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MINERAL IDENTIFICATION BY THEIR PHYSICAL PROPERTIES
STREAK HARDNESS CLEAVAGE CRYSTAL FORM Cubic crystal of pyrite Dodecahedral crystal of garnet Hexagonal crystal of quartz Conchoidal fracture Diamond 10 Corundum 9 Topaz 8 Quartz 7 Orthoclase 6 Apatite 5 ...
http://www.utc.edu/Faculty/Jonathan-Mies/wkshop/wkshop_prod/min_table2_a.pdf
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