Name: Period:, 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) scratches anything lower on scale (diamond) a knife, What is it? 5 Erika is holding a vexy soft ,Mineral Identification Flow Chart, Mineral Identification Flow Chart Can be Scratched by Pocketknife or Penny Can not be Scratched by Pocket knife or Penny Can be Scratched by a Fingernail Can be scratched by a Pocket Knife or Steel File Colorless to white, brown, gray, silver can also be brownish-red or other colors Magnetic - can ,Mohs Hardness Scale, (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) 5: Apatite: When you are hungry you have a big "appetite"Mineral Identification Key, The Mineral Identification Key Table IID-1: Nonmetallic Luster, Hardness Greater Than 3 but Less Than 5½, and Prominent Cleavage: (Can not be scratched by a copper penny, can be scratched by a knife, streak white or none)Mineral ID, Hardness: 4 (cannot be scratched by fingernail or penny, can be scratched by a steel knife) Cleavage: 4 directions, but your sample may be bad; Clarity: naturally translucent, but often has cracks or impurities under the surface Olivine Hardness: 7 (cannot be scratched by anything in the mineral kit) Streak: none (it scratches the streak plate).
What Can Scratch a Diamond? | Leibish, Each of the minerals can be scratched by the one above and will scratch the one below Diamonds occupy the top spot with an absolute hardness of 1500 This makes them much harder than corundum (sapphire and ruby), which comes in at number nine in the ,Mineral identification, Sep 10, 2015· Physical Properties Mineral appearance Hardness Luster Specific gravity Streak Mineral identification Cleavage and fracture apperance of minerals Mineral ,harder substance scratches a softer one Mohs Scale of ,, -excellent cleavage-reflects light in one direction from a set of obvious, large, flat parallel surfaces-good cleavage-reflects light in one directionfrom a set of many small, obvious, flat, parallel surfaces-poor cleavage-reflects light from a set of small, flat, parallel surfaces that are hard to detect >cleavage direction- see page 55 Fracture: any break in a mineral that does not occur ,Geology, Rather, it is a method of gauging the relative hardness of a mineral 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 ,Mineral ID_Key, Table IID-1: Nonmetallic Luster, Hardness Greater Than 3 but Less Than 5½, and Prominent Cleavage: (Can not be scratched by a copper penny, can be scratched by a knife,.
Mohs Scale of Hardness | Pohaku Fabrication Kauai, Cannot be scratched with a knife This mineral can scratch glass with some difficulty 7: Quartz: Can scratch glass easily This is where most granites are rated in terms of hardness 8: Topaz: Can scratch glass very easily 9: Corundum: Can cut glass 10: Diamond: Can scratch virtually anything, is commonly used to cut glass and stoneExploring the Characteristics of Minerals, QUARTZ is a naturally clear mineral It can occur in almost any color, however, if it contains traces of other elements Its natural crystal shape is 6 sided Quartz is very hard (7 on Mohs hardness scale) It cannot be scratched by a steel knife or nail Quartz is the most common mineral on the surface of ,Which mineral is harder than calcite but wont scratch a knife?, Mineral cannot be scratched with a fingernail but can be scratched with a steel nail Gypsum SOFT Mineral can be scratched with a fingernail Pink Feldspar HARD Mineral cannot be scratched with a steel nail White Feldspar HARD Mineral cannot be scratched with a steel nail Gray Feldspar HARD Mineral cannot be scratched with a steel nail Quartz ,Rocks and Minerals Multiple Choice, the mineral dolomite? (1) Dolomite can scratch window glass, but cannot be scratched by a fingernail (2) Dolomite can scratch window glass, but cannot be scratched by a steel nail (3) Dolomite can scratch a copper penny, but cannot be scratched by a fingernail (4) Dolomite can scratch a copper penny, but cannot be scratched by a steel nailScience Chapter 4 Minerals Section 1 Flashcards | Quizlet, this means the mineral cannot form from materials that were once part of a living thing crystal the repeating pattern of a mineral's particles forms a solid; has flat sides, called faces, that meet at sharp edges and corners , a steel knife can scratch it Feldspar it can't be scratched by a steel knife, but it can scratch window glass ,.
MINERALS AND FORENSIC SCIENCE, A hard mineral can not be scratched by a soft mineral Hardness should not be confused with toughness or brittleness For example, window glass and a knife blade have about the same hardness since one will not scratch the other There is no doubt, however, that the knife ,KGS, The mineral may be white, yellow, red, brown, green, gray, blue, or transparent and colorless Precious opal, which is not found in Kansas, shows a beautiful play of colors and is highly prized as a gemstone Opal cannot be scratched by a knife, but is slightly softer than quartzMinerals | Science Quiz, Play this game to review Science A mineral should be solPhysical Characteristics of Rocks, If a mineral is scratched by a knife, it is softer than the knife If it cannot be scratched by a knife, the two are equal hardness or the mineral is the harder In order to have a standard method of expressing hardness of minerals, a simple scale, known as the Mohs scale, has been universally adoptedChart, Can be scratched with coin: Pearl: 3 - 4 Coral: 3 - 4 Malachite: 3-1/2 - 4: 4: Can be scratched easily with a knife; cannot scratch glass: Rhodochrosite: 4: 5: Can be scratched with a knife; can just scratch glass: Lapis Lazuli: 5 - 6 Turquoise: 5 - 6 Opal: 5-1/2 - 6-1/2: 6: Can be scratched with a steel file; easily scratches window/bottle ,.
Mineral Identification Key, The Mineral Identification Key Table IB: Minerals with Metallic or Submetallic Luster & Hardness greater than 2½, but less than 5½: (Will not easily mark paper, but can be scratched with a pocket knife)2 p 102 Answer the following questions Part E A mineral ,, A mineral can be scratched by a masonry nail or knife blade but not by a wire (iron) nail (see Figure 39 on p81) 1 Is this mineral hard or soft? Hard 2 What is the hardness number of this mineral on Mohs Scale? 5 3 What mineral on Mohs Scale has such a hardness? Apatite 6Ask, Aug 26, 2013· We love the questions that come to us in the the Ask-A-Geologist feature Today, a great question about the Mohs hardness scale Remember, you can submit your own questions and we will answer them for you Question: Based on Mohs hardness scale an unknown mineral scratched apatiteh2g2, Oct 08, 2004· Using this system, minerals may simply be classified as: soft (can be scratched with a fingernail), medium (can be scratched with a knife or glass but not by a fingernail) or hard (cannot be scratched by a knife) This simple classification is appropriate to use up to lower secondary school levelHelp with minerals please just a simple question? | Yahoo ,, Feb 04, 2007· The knife is harder than the chocolate So the knife can scratch the chocolate But the chocolate can't scratch the knife Therefore, your question seems odd, because these questions usually have you to determine the hardness based on: the mineral scratches one mineral, but this other (harder) mineral scratches it.
PHYSICAL PROPERTIES OF SOME COMMON MINERALS, 1Erik has a handful of whitish-grey stones with a nonmetallic luster that leave a colorless streak They can be scratched by a steel file but not by a knife What does he have? 2Both kids have found samples of a red mineral which leaves a gray streak It can be scratched with 2 can be scratched by fingernail and with a penny,and it can be easily cut with a knifeMohs hardness | mineralogy | Britannica, Mohs hardness, rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised (1812) by the German mineralogist Friedrich Mohs The Mohs hardness of a mineral is determined by observing whether its surface is scratched by a substance of known or defined hardness To give numerical values to this physical property, minerals are ranked ,What minerals can a steel knife scratch?, Will scratch a fingernail, may scratch a copper coin)4FluoriteFluorine in fluorite prevents tooth decay(Can be scratched by a steel pocket knife Will scratch a fingernail and a copper coin ,mineral can not be scratched with a knife, 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 7 on Mohs scale A relative hardness value of 6 5 means that the mineral could scratch orthoclase feldspar but not quartz Get PriceDO NOT WRITE ON THIS PAGE, 15 If you have a brown mineral that leaves a brown streak, fractures irregularly, can be scratched by a steel file but not a knife and has a metallic luster, what mineral might it be? 16 If you have found a whitish mineral that glows when you put it under ultraviolet light, leaves a colorless streak and cannot be scratched with a penny but can ,.