Beaglejuice13
Jr. Member
Cinnabar?
Part of a lifetime collection of rocks and minerals from the U.P. of Michigan.
Part of a lifetime collection of rocks and minerals from the U.P. of Michigan.
Another beautiful mystery rock from Copper Country
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IAMZIM
Bronze Member
- Apr 23, 2011
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It looks like potassium feldspar to me.....not sure on that though. The "red" could be iron staining or limonite(spelling) I dont think it's cinnibar.
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Looks like Calcite (white), Hematite or possibly Goethite (black) and Hematite or Goethite converting to Limonite (reddish).
The white could be feldspar (hardness ~6) instead of calcite (hardness 3), a simple hardness test will distinguish the two.
Limonite is not a true mineral it's a mineraloid. It can be various colors of red/orange/brown and is almost always found in direct association with iron minerals like Magnetite, Hematite and Goethite.
The white could be feldspar (hardness ~6) instead of calcite (hardness 3), a simple hardness test will distinguish the two.
Limonite is not a true mineral it's a mineraloid. It can be various colors of red/orange/brown and is almost always found in direct association with iron minerals like Magnetite, Hematite and Goethite.
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