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Your choices have been narrowed down, using the chart see which physical properties match up with your mineral.
What we know about your mineral so far:
-Metallic luster
-Does NOT scratch glass
Use chart below to determine your mineral:
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lead ore PbS |
Silvery in color
heavy H: 2.5 G: 7.6 perfect cubic cleavage lead gray streak |
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CuFeS2 |
Brass-yellow in color
tarnishes to purple H: 3.5-4 G: 4.5 green-black streak |
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zinc ore ZnS |
Brown, black, or yellow in color
6 directions of cleavage H: 3.5-3.5 G: 4 yellow, brown or white streak that has a rotten egg smell |