Properties of Minerals - University of Kansas

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Properties ofGeologists usecharacteristics to tellone mineral from Mineral Properties we will.
Luster HardnessCleavage Streak Refers to the way light reflectsfrom the surface of the mineral There are two types of luster .
Metallic looks like polished metal Nonmetallic does not look likepolished metal Nonmetallic can be shiny or dull Pyrite has metallic.
Quartz has nonmetallic Hardness Is measured by how easy it is to scratch Geologists order the hardness by 1 Scratched by a fingernail .
2 Scratched by a penny 3 Scratched by a nail 4 Scratched by a diamond These are not all of the tools geologistsuse but it will work for our experiment .
Gypsum is soft it can bescratched by a fingernail Calcite is soft but a littleharder because it cannot bescratched by a fingernail but it.
can be scratched by a penny Fluorite is harder It can bescratched by a nail but not apenny or fingernail Diamonds are the hardest.
mineral so it scratches every Cleavage Not all minerals have cleavage Some minerals split easilyalong a flat surface .
The number of lines that arecreated when a mineral is splitwill be the number of cleavage Mica has cleavage in onedirection .
It breaks along one line Feldspar has two lines ofcleavage It breaks alongtwo lines Red chalk on a chalk board.
makes red marks White chalkmakes white marks Not all minerals work this way When some minerals arescratched along a ceramic streak.
plate it creates a different color When gold isrun across astreak plate ityellowish gold.
That makes Pyrite or Fool s Gold When pyrite is runacross a streak plate it has a black or dark.
green streak Pyrite is not worthmuch money whilegold is worth a lot They look alike so.
miners call it fool s Hematite Hematite s color isgrey but its streak Hema means blood .
The mineral wasnamed hematitebecause it lookedlike it was bleedingwhen it was taken.
across a streak One mineralproperty we willnot use A mineral can be many.
different colors Below is Mica Many minerals can be the same color Below are gold colored minerals Which one The answer None of them.
were real gold Just like with people Outside color does not tellyou much about theimportant characteristics .
Properties of Minerals Geologists use characteristics to tell one mineral from another Mineral Properties we will study Luster Refers to the way light reflects from the surface of the mineral. There are two types of luster, Metallic: looks like polished metal. Nonmetallic: does not look like polished metal. Nonmetallic can be shiny or dull.

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