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About Joe Norris
Expertise
I am an economic geologist. An economic geologist does mineral evaluations and appraisals of mineral or mining properties. I can tell you if your deposit has value - remember that a mineral deposit, no matter how good, only has value when mined. Any value assigned to a mineral deposit, in the ground, is only the speculative value that deposit.

Experience
I have been a economic geologist for most of my 35 year career. Although I have done work in perhaps 45 states and numerious countries much of my work has been in Appalachian coal, intermountain west gold and silver, and Arizona uranium.

Organizations
Past President of the Virginia Section of the American Institute of Professional Geologists and a certified geologist in twelve states.

Education/Credentials
BS Degree from Eastern Kentucky University. Work on MS Degree @ Eastern Kentucky University, Colorad School of Mines & Marshall University Numerious short courses on the value of mineral deposits and how to value same. Also several short courses dealing with the different types of geologic processes; sedimentary, igneous, metamorphic along with the mineral associated with each.

 
   

You are here:  Experts > Science > Geology > Geology > Iron Minerals

Geology - Iron Minerals


Expert: Joe Norris - 7/10/2009

Question
Does all stones contain iron minerals to some extent?


Answer
No, in fact iron (Fe) is rather far down on the scale at number 4 and composing about 5% of the chemical composition of the earth's crust.  The first ten elements and their percentages are:

Oxygen              @                46.6%
Silicone            @                27.0%
Aluminum            @                 8.1%
Iron                @                 5.0%
Calcium             @                 3.6%
Sodium              @                 2.8%
Potassium           @                 2.6%
Magnesiumn          @                 2.1%
Titanium            @                 0.4%
Hydrogen            @                 0.14%

The average chemical composition of igneous and sedimentary rocks are:

SiO2  59.14% in Ig       57.95% in Sed.
Al2O3 15.34              13.39
CaO    5.08               5.89
Na2O   3.84               1.13
FeO    3.80               2.08
K2O    3.13               2.86
Fe2O3  3.08               3.47
H2O    1.15               3.23
TiO2   1.05               0.57
P2O5   0.30               0.13
CO2    0.10               5.38
BaO    0.06                 -
SO3     -                 0.54
C       -                 0.66
______________________________
Totals 99.56              99.93  

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