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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
-Scratches glass
Use chart below to determine your mineral:
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specular variety Fe2O3 |
Steel-gray to black to brown in color
micaceous H: 5-6.5 G: 3.3-3.4 reddish-brown streak |
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FeS2 |
Pale brass-yellow in color
often occurs in cubes H: 6-6.5 G: 5 green-black to brown-black streak |
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Fe3O4 |
Strongly magnetic
black in color commonly occurs in masses or single, octahedral crystals H: 6 G: 5.2 black streak |