Tungsten
Tungsten is an metal alloy that is used in many ways.
By: Jack and David S.
Color
Tungsten is usually silver it can range from; Gray Dark Gray Silver Platinum (Color)
Streak
Tungsten does not have a streak because it is a metal. But it does when mixed with other materials.
Luster
Tungsten has a shiny metallic luster.
Hardness
Tungsten is a 7.5-8 on the Moh’s Hardness Scale.
Harder;TopazCorundum
Softer;FeldsparApatite
Cleavage of Tungsten
Tungsten is found mostly in four different ores: scheelite, wolframite, ferberite, and huebnerite. Of these four, wolframite is the principal ore for tungsten and the only one not too brittle to measure its cleavage.
The cleavage of wolframite is perfect, numerically noted as (010), and indicates that wolframite breaks cleanly in one direction.
From http://www.ask.com/question/what-is-the-streak-of-tungsten
Crystal Shape
Tungsten does not have a crystal shape. it is a metal not a crystal.
Where Tungsten is found47% of Tungsten is found in China
Uses
Tank armor Jewelry Anti-tank weapons High speed tools Car parts
SOURCES
http://www.ask.com/question/what-is-the-streak-of-tungsten
http://chemistry.about.com/od/elementfacts/a/tungstenwolfram.htm
http://www.larsonjewelers.com/Tungsten-Cobalt-and-More-on-Mohs-Scale-of-Mineral-Hardness.aspx
http://minerals.usgs.gov/minerals/pubs/commodity/tungsten/stat/
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