calcite can be scratched by a knife

calcite can be scratched by a knife

    Please help to identify this stone - Minerals Question , calcite can be scratched by a knife ,Calcite Limestone and most shells contain calcite (Can be scratched by a steel pocket knife or sometimes a copper coin Will scratch a fingernail, may scratch a copper coin) 4 Fluorite Fluorine in fluorite prevents tooth decay (Can be scratched by a steel pocket knife Will scratch a fingernail and a copper coin)Mohs Hardness Scale: Testing the Resistance to Being ScratchedMohs Hardness Scale A rapid hardness test for field and classroom use , If Specimen A can scratch Specimen B, then Specimen A is harder than Specimen B , For example, a geologist in the field might always carry a pocket knife The knife can be used for a quick hardness test to determine if a specimen is harder or softer than ,.

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  • Metallic Luster - eldredk12nyus

    calcite) 4 can be scratched easily by a knife (fluorite) 5 can be scratched by a knife with difficulty (apatite) 6 can be scratched by a steel file (orthoclase) 7 scratches a steel file (quartz) 8 scratches quartz (topaz) 9 scratches ,...

  • Background knowledge Science activity - ,

    Background knowledge Mineralsare natural materials found on our planet Scientists classify these , For example, calcite can scratch gypsum but gypsum cannot scratch calcite All solids can be given a hardness rating by comparing them to the , minerals will scratch the steak knife? Explain ....

  • What rocks can scratch mirrors/glass? | Yahoo Answers

    Apr 20, 2008· What rocks can scratch mirrors/glass? So, basically I found a ring set in 18k white gold I suspected it was a diamond so I saced my mirror and the rock scratched it , Calcite Calcite can be scratched with a copper coin 4 Fluorite Fluorite can be scratched by a knife blade or window glass 5...

  • What mineral can be scratched by a steel knife but not ,

    What mineral can be scratched by a steel knife but not a copper penny? , calcite Share to: What mineral can be scratched by a penny but not a fingernail?...

  • Name: Period: - Dixie Middle School Science

    by a penny (calcite) can be scratched easily by a knife (fluorite) can be scratched by a knife with difficulty (apatite) can be scratched by a steel file (orthoclase) scratches a steel file (quartz) scratches quartz (topaz) scratches anything lower on scale (corundum)...

  • Mohs Hardness Scale - Rockroost

    Calcite: Limestone and most shells contain calcite (Can be scratched by a steel pocket knife or sometimes a copper coin Will scratch a fingernail, may scratch a copper coin) , Emerald and aquamarine are varieties of beryl with a hardness of 8 (Will scratch glass, steel blades, copper coins & fingernails) 9:...

  • Minerals - Geology (US National Park Service)

    Generally white to clear, calcite is easily scratched with a knife Due to the presence of carbonates (CO3), calcite reacts to most acids (such as hydrochloric acid, HCl) and effervesces on contact Most seashells are made of calcite or related minerals Calcite can be found in many cave and karst formations such as the calcite features at ....

  • Chapter 2 Lab - Jan Rasmussen

    Chapter 2 Lab 2 Graphite , Calcite can be any color Clear to white is most common, but calcite can be pink , HCl, then use a knife or a nail to scratch a piece of the mineral to make a powder, then put a drop of hydrochloric acid on that powder to see if it fizz Dolomite can be...

  • NPS: Explore Nature » Geologic Resources » Education ,

    Generally white to clear, calcite is easily scratched with a knife Due to the presence of carbonates (CO 3 ), calcite reacts to most acids (such as hydrochloric acid, HCl) and effervesce on contact Most seashells are made of calcite or related minerals...

  • Minerals Lesson #11 - Oregon State University

    Some minerals are so hard that they can scratch steel while other minerals are so soft that they feel powdery and can be scratched easily by a fingernail , fingernail 3) penny 4) easy to scratch knife blade 5) hard to scratch a knife blade 6) will scratch glass slide 7) quartz crystal , Calcite is the material that forms stalactites and ....

  • Hardness: Mineral Properties - The Mineral and ,

    Knife blade : 5½ : Glass : 5½: Steel file , (Calcite) Mineral gets scratched Mineral must be between 2 and 3 Two minerals with equal hardness will scratch each other This gives an advantage to the hardness testing kit that includes real minerals over rods One can scratch the mineral from the kit instead of scratching a nice specimen...

  • What mineral can be scratched by a steel knife but not ,

    What mineral can be scratched by a steel knife but not a copper penny? , calcite Share to: What mineral can be scratched by a penny but not a fingernail?...

  • Calcite | mineral | Britannica

    Calcite is number 3 on the Mohs hardness scale; thus, it can be scratched readily by a knife blade or geologic pick It has a specific gravity of 271 Three perfect cleavages give calcite its six-sided polyhedrons with diamond-shaped faces; the angles defining the faces are 78° and 102°...

  • Mineral Hardness Testing from Rockman

    So, if you can''t scratch the specimen with your fingernail (H=25), but a penny does the job, you immediately know that it is at least as hard as calcite (H=3) The steel blade of the average knife usually has a hardness of about 55...

  • Minerals - Earth Science Education

    Most minerals have a relatively narrow range of hardness and can be put into the scale Human-made materials such as a knife blade or pane of glass can be ranked on the scale So the game becomes "What can scratch what?"...

  • Calcite, Limestone and Marble - What On Earth

    Calcite is number 3 on the Mohs hardness scale; it can be scratched readily by a knife blade or geologic pick It has a specific gravity of 271 Three perfect cleavages give calcite its six-sided polyhedrons with diamond shaped faces; the angles defining the faces are 78 and 102 degre...

  • Mohs Hardness Scale Gemstones | Joseph Jewelry ,

    This number can be consistently ascertained by the ability of a particular sample of gold to scratch or leave an abrasion on gypsum (2), while being vulnerable to scratches when coming into contact with calcite (3) and all harder materials...

  • mineral | Hardness - Students | Britannica Kids | ,

    mineral - Hardness - Mohs hardness scale and observations on hardness of some additional materialsThe hardness of a mineral is how resistant it is to scratching Hardness is a very useful property in mineral identification and is usually stated in terms of the Mohs scale This scale ranks 10 common minerals in ascending order from the ,...

  • Mohs Hardness Scale - The Rock Shed

    Helpful Hardness Tips It is generally beneficial to tumble rocks of the same kind or of the same hardness together Jaspers, Agates and Quartzes all have a hardness of approximately 7 to 7 1/2 and thus can be tumbled together...

  • Calcite | GeoKansas

    Calcite has rhombic-shaped crystals, although individual crystals can rarely be seen in limestone because the calcite crystals in limestone are very small Generally, it is white or colorless, but it may be tinted gray, red, green, or blue It can be scratched with a knife but not with a fingernail The calcite crystals from the lead and zinc ....

  • Minerals - Geology (US National Park Service)

    Generally white to clear, calcite is easily scratched with a knife Due to the presence of carbonates (CO3), calcite reacts to most acids (such as hydrochloric acid, HCl) and effervesces on contact Most seashells are made of calcite or related minerals Calcite can be found in many cave and karst formations such as the calcite features at ....

  • 3rd grade: Mohs Hardness Scale (ooh, ooh, ooh)

    Sep 23, 2014· I use the Mohs Hardness Scale (ooh, ooh, ooh) There is talc, gypsum, calcite, and fluorite too So I''m like, Mohs Hardness Scale , But calcite can be scratched by a copper penny Fluorite and apatite can both be scratched with a steel knife Hmmm but orthoclase is with window glass Go run tell your science teacher!...

  • Geology - rocks and minerals - University of Auckland

    If a mineral cannot be scratched by a knife blade but can be scratched by quartz then its hardness is between 5 and 7 (stated as 5-7) on Mohs scale A relative hardness value of 65 means that the mineral could scratch orthoclase (feldspar) but not quartz...

  • LAB 2: MINERAL PROPERTIES AND ,

    scratch them with your fingernail, seeing whether they will scratch glass, and seeing if they can be scratched with a nail or a knife blade CAUTIONS: the hardness of most minerals can be properly determined only on a single crystal...

  • Mohs Hardness Test - Oakton Community College

    "Objects of equal hardness can be scratched with difficulty" How to perform the scratch test: You should find a sharp corner of a mineral and scratch the smooth surface of the test object (fingernail, penny, glass plate, knife, steel file, etc)...

  • Is a fingernail a mineral - Answers

    Is a fingernail a mineral? , Limestone and most shells contain calcite (Can be scratched by a steel pocket knife or sometimes a copper coin Will scratch a fingernail, may scratch a copper coin ....

  • mineral | Hardness - Students | Britannica Kids | ,

    mineral - Hardness - Mohs hardness scale and observations on hardness of some additional materialsThe hardness of a mineral is how resistant it is to scratching Hardness is a very useful property in mineral identification and is usually stated in terms of the Mohs scale This scale ranks 10 common minerals in ascending order from the ,...

  • Minerals - Hardness

    A simpler version of the Mho''s scale can be established using three types of hardness: SOFT - Minerals that can be scratched with a fingernail INTERMEDIATE - Minerals that cannot be scratched with a fingernail but can be scratched with a steel nail...