Mineral Commodity Specialists

Minerals Information commodity specialists collect and analyze information on production, trade, and consumption of minerals from raw material through refining to finished products. Mineral commodity specialists can answer questions on these aspects of a mineral commodity.

Alphabetical Index

| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

A
• Abrasives, Manufactured
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Alumina
  E. Lee Bray
  Phone: 703-648-4979
  Fax: 703-648-7757
  Email: lbray@usgs.gov
  

• Aluminum (Al)
  E. Lee Bray
  Phone: 703-648-4979
  Fax: 703-648-7757
  Email: lbray@usgs.gov
  

• Aluminum Oxide, Fused
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Antimony (Sb)
  James F. Carlin, Jr.
  Phone: 703-648-4985
  Fax: 703-648-7757
  Email: jcarlin@usgs.gov
  

• Arsenic (As)
  William E. Brooks
  Phone: 703-648-7791
  Fax: 703-648-7757
  Email: wbrooks@usgs.gov
  

• Asbestos
  Robert L. Virta
  Phone: 703-648-7726
  Fax: 703-648-7975
  Email: rvirta@usgs.gov
  

• Asphalt, Natural
  Hendrik van Oss
  Phone: 703-648-7712
  Fax: 703-648-7757
  Email: hvanoss@usgs.gov
  

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  B

• Barite
  M. Michael Miller
  Phone: 703-648-7716
  Fax: 703-648-7757
  Email: mmiller1@usgs.gov
  

• Bauxite
  E. Lee Bray
  Phone: 703-648-4979
  Fax: 703-648-7757
  Email: lbray@usgs.gov
  

• Beryllium (Be)
  Brian W. Jaskula
  Phone: 703-648-4908
  Fax: 703-648-7757
  Email: bjaskula@usgs.gov
  

• Bismuth (Bi)
  James F. Carlin, Jr.
  Phone: 703-648-4985
  Fax: 703-648-7757
  Email: jcarlin@usgs.gov
  

• Boron (B)
  Desiree Polyak
  Phone: 703-648-4909
  Fax: 703-648-7757
  Email: dpolyak@usgs.gov
  

• Bromine (Br)
  Lori E. Apodaca
  Phone: 703-648-7724
  Fax: 703-648-7757
  Email: lapodaca@usgs.gov
  
  

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  C

• Cadmium (Cd)
  Amy C. Tolcin
  Phone: 703-648-4940
  Fax: 703-648-7757
  Email: atolcin@usgs.gov
  

• Calcium
  M. Michael Miller
  Phone: 703-648-7716
  Fax: 703-648-7757
  Email: mmiller1@usgs.gov
  

• Calcium Carbonate
  Jason C. Willett
  Phone: 703-648-6473
  Fax: 703-648-7975
  Email: jwillett@usgs.gov
  

• Cement
  Hendrik van Oss
  Phone: 703-648-7712
  Fax: 703-648-7757
  Email: hvanoss@usgs.gov
  

• Cesium (Cs)
  Desiree Polyak
  Phone: 703-648-4909
  Fax: 703-648-7757
  Email: dpolyak@usgs.gov
  

• Chromium (Cr)
  John F. Papp
  Phone: 703-648-4963
  Fax: 703-648-7757
  Email: jpapp@usgs.gov
  

• Clays
  Robert L. Virta
  Phone: 703-648-7726
  Fax: 703-648-7975
  Email: rvirta@usgs.gov
  

• Coal Combustion Products
  
  • FGD gypsum Robert D. Crangle, Jr.
    Phone: 703-648-6410
    Fax: 703-648-7975
    Email: rcrangle@usgs.gov
    
  
  
  • Flyash Hendrik van Oss
    Phone: 703-648-7712
    Fax: 703-648-7757
    Email: hvanoss@usgs.gov

• Cobalt (Co)
  Kim B. Shedd
  Phone: 703-648-4974
  Fax: 703-648-7757
  Email: kshedd@usgs.gov
  

• Columbium (Nb)
  John F. Papp
  Phone: 703-648-4963
  Fax: 703-648-7757
  Email: jpapp@usgs.gov
  

• Copper (Cu)
  Daniel L. Edelstein
  Phone: 703-648-4978
  Fax: 703-648-7757
  Email: dedelste@usgs.gov
  

• Corundum
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

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  D

• Diamond
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Diatomite
  Robert D. Crangle, Jr.
  Phone: 703-648-6410
  Fax: 703-648-7975
  Email: rcrangle@usgs.gov
  

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  E

• Explosives
  Lori E. Apodaca
  Phone: 703-648-7724
  Fax: 703-648-7757
  Email: lapodaca@usgs.gov
  

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  F

• Feldspar
  Michael J. Potter
  Phone: 703-648-7723
  Fax: 703-648-7975
  Email: mpotter@usgs.gov
  

• Ferroalloys
  Lisa A. Corathers
  Phone: 703-648-4973
  Fax: 703-648-7757
  Email: lcorathers@usgs.gov
  

• Fluorspar
  M. Michael Miller
  Phone: 703-648-7716
  Fax: 703-648-7757
  Email: mmiller1@usgs.gov
  

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  G

• Gallium (Ga)
  Brian W. Jaskula
  Phone: 703-648-4908
  Fax: 703-648-7757
  Email: bjaskula@usgs.gov
  

• Garnet
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Gemstones
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Germanium (Ge)
  David E. Guberman
  Phone: 703-648-4977
  Fax: 703-648-7757
  Email: dguberman@usgs.gov
  

• Gold (Au)
  Micheal W. George
  Phone: 703-648-4962
  Fax: 703-648-7757
  Email: mgeorge@usgs.gov
  

• Graphite
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Greensand
  Dennis S. Kostick (Acting)
  Phone: 703-648-7715
  Fax: 703-648-7757
  Email: dkostick@usgs.gov
  

• Gypsum
  Robert D. Crangle, Jr.
  Phone: 703-648-6410
  Fax: 703-648-7975
  Email: rcrangle@usgs.gov
  

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  H

• Hafnium (Hf)
  Joseph Gambogi
  Phone: 703-648-7718
  Fax: 703-648-7975
  Email: jgambogi@usgs.gov
  

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  I

• Indium (In)
  Amy C. Tolcin
  Phone: 703-648-4940
  Fax: 703-648-7757
  Email: atolcin@usgs.gov
  

• Iodine (I)
  Desiree Polyak
  Phone: 703-648-4909
  Fax: 703-648-7757
  Email: dpolyak@usgs.gov
  
  

• Iron
  Michael D. Fenton
  Phone: 703-648-4972
  Fax: 703-648-7757
  Email: mfenton@usgs.gov
  

• Iron Ore
  John D. Jorgenson
  Phone: 703-648-4912
  Fax: 703-648-7757
  Email: jjorgenson@usgs.gov
  

• Iron Oxide Pigments
  Michael J. Potter
  Phone: 703-648-7723
  Fax: 703-648-7975
  Email: mpotter@usgs.gov
  

• Iron and Steel Scrap
  Michael D. Fenton
  Phone: 703-648-4972
  Fax: 703-648-7757
  Email: mfenton@usgs.gov
  

• Iron and Steel Slag
  Hendrik van Oss
  Phone: 703-648-7712
  Fax: 703-648-7757
  Email: hvanoss@usgs.gov
  

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  K

• Kyanite
  Michael J. Potter
  Phone: 703-648-7723
  Fax: 703-648-7975
  Email: mpotter@usgs.gov
  

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  L

• Lead (Pb)
  David E. Guberman
  Phone: 703-648-4977
  Fax: 703-648-7757
  Email: dguberman@usgs.gov
  

• Lime
  M. Michael Miller
  Phone: 703-648-7716
  Fax: 703-648-7757
  Email: mmiller1@usgs.gov
  

• Lithium (Li)
  Brian W. Jaskula
  Phone: 703-648-4908
  Fax: 703-648-7757
  Email: bjaskula@usgs.gov
  

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  M

• Magnesium (Mg)
  Deborah A. Kramer
  Phone: 703-648-7719
  Fax: 703-648-7975
  Email: dkramer@usgs.gov
  

• Manganese (Mn)
  Lisa A. Corathers
  Phone: 703-648-4973
  Fax: 703-648-7757
  Email: lcorathers@usgs.gov
  

• Mercury (Hg)
  William E. Brooks
  Phone: 703-648-7791
  Fax: 703-648-7757
  Email: wbrooks@usgs.gov
  

• Mica
  James B. Hedrick
  Phone: 703-648-7725
  Fax: 703-648-7757
  Email: jhedrick@usgs.gov
  

• Molybdenum (Mo)
  Michael J. Magyar
  Phone: 703-648-4910
  Fax: 703-648-7757
  Email: mmagyar@usgs.gov
  

• Mullite
  Michael J. Potter
  Phone: 703-648-7723
  Fax: 703-648-7975
  Email: mpotter@usgs.gov
  

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  N

• Nepheline Syenite
  Michael J. Potter
  Phone: 703-648-7723
  Fax: 703-648-7975
  Email: mpotter@usgs.gov
  

• Nickel (Ni)
  Peter H. Kuck
  Phone: 703-648-4965
  Fax: 703-648-7757
  Email: pkuck@usgs.gov
  

• Niobium (Nb)
  John F. Papp
  Phone: 703-648-4963
  Fax: 703-648-7757
  Email: jpapp@usgs.gov
  

• Nitrogen (N)
  Lori E. Apodaca
  Phone: 703-648-7724
  Fax: 703-648-7757
  Email: lapodaca@usgs.gov
  

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  P

• Peat
  Lori E. Apodaca
  Phone: 703-648-7724
  Fax: 703-648-7757
  Email: lapodaca@usgs.gov
  

• Perlite
  Wallace P. Bolen
  Phone: 703-648-7727
  Fax: 703-648-7975
  Email: wbolen@usgs.gov
  

• Phosphate Rock
  Stephen M. Jasinski
  Phone: 703-648-7711
  Fax: 703-648-7757
  Email: sjasinsk@usgs.gov
  

• Platinum-Group Metals
  Patricia J. Loferski
  Phone: 703-648-7708
  Fax: 703-648-7757
  Email: ploferski@usgs.gov
  

• Potash
  Stephen M. Jasinski
  Phone: 703-648-7711
  Fax: 703-648-7757
  Email: sjasinsk@usgs.gov
  

• Pumice
  Robert D. Crangle, Jr.
  Phone: 703-648-6410
  Fax: 703-648-7975
  Email: rcrangle@usgs.gov
  

• Pyrophyllite
  Robert L. Virta
  Phone: 703-648-7726
  Fax: 703-648-7975
  Email: rvirta@usgs.gov
  

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  Q

• Quartz Crystal
  Thomas P. Dolley
  Phone: 703-648-7710
  Fax: 703-648-7975
  Email: tdolley@usgs.gov
  

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  R

• Rare Earths
  James B. Hedrick
  Phone: 703-648-7725
  Fax: 703-648-7757
  Email: jhedrick@usgs.gov
  

• Rhenium (Re)
  Michael J. Magyar
  Phone: 703-648-4910
  Fax: 703-648-7757
  Email: mmagyar@usgs.gov
  

• Rubidium (Rb)
  Desiree Polyak
  Phone: 703-648-4909
  Fax: 703-648-7757
  Email: dpolyak@usgs.gov
  

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  S

• Salt
  Dennis S. Kostick
  Phone: 703-648-7715
  Fax: 703-648-7757
  Email: dkostick@usgs.gov
  

• Sand and Gravel, Construction
  Wallace P. Bolen
  Phone: 703-648-7727
  Fax: 703-648-7975
  Email: wbolen@usgs.gov
  

• Sand and Gravel, Industrial
  Thomas P. Dolley
  Phone: 703-648-7710
  Fax: 703-648-7975
  Email: tdolley@usgs.gov
  

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  R

• Scandium (Sc)
  James B. Hedrick
  Phone: 703-648-7725
  Fax: 703-648-7757
  Email: jhedrick@usgs.gov
  

• Selenium (Se)
  Micheal W. George
  Phone: 703-648-4962
  Fax: 703-648-7757
  Email: mgeorge@usgs.gov
  

• Silicon (Si)
  Lisa A. Corathers
  Phone: 703-648-4973
  Fax: 703-648-7757
  Email: lcorathers@usgs.gov
  

• Silicon carbide
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Silver (Ag)
  William E. Brooks
  Phone: 703-648-7791
  Fax: 703-648-7757
  Email: wbrooks@usgs.gov
  

• Soda Ash
  Dennis S. Kostick
  Phone: 703-648-7715
  Fax: 703-648-7757
  Email: dkostick@usgs.gov
  

• Sodium Carbonate
  Dennis S. Kostick
  Phone: 703-648-7715
  Fax: 703-648-7757
  Email: dkostick@usgs.gov
  

• Sodium Sulfate
  Dennis S. Kostick
  Phone: 703-648-7715
  Fax: 703-648-7757
  Email: dkostick@usgs.gov
  

• Staurolite
  Donald W. Olson
  Phone: 703-648-7721
  Fax: 703-648-7975
  Email: dolson@usgs.gov
  

• Steel
  Michael D. Fenton
  Phone: 703-648-4972
  Fax: 703-648-7757
  Email: mfenton@usgs.gov
  

• Stone, Crushed
  Jason Christopher Willett
  Phone: 703-648-6473
  Fax: 703-648-7975
  Email: jwillett@usgs.gov
  

• Stone, Dimension
  Thomas P. Dolley
  Phone: 703-648-7710
  Fax: 703-648-7975
  Email: tdolley@usgs.gov
  

• Strontium (Sr)
  Desiree Polyak
  Phone: 703-648-4909
  Fax: 703-648-7757
  Email: dpolyak@usgs.gov
  

• Sulfur (S)
  Joyce A. Ober
  Phone: 703-648-7717
  Fax: 703-648-7757
  Email: jober@usgs.gov
  

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  T

• Talc
  Robert L. Virta
  Phone: 703-648-7726
  Fax: 703-648-7975
  Email: rvirta@usgs.gov
  

• Tantalum (Ta)
  John F. Papp
  Phone: 703-648-4963
  Fax: 703-648-7757
  Email: jpapp@usgs.gov
  

• Tellurium (Te)
  Micheal W. George
  Phone: 703-648-4962
  Fax: 703-648-7757
  Email: mgeorge@usgs.gov
  

• Thallium (Tl)
  David E. Guberman
  Phone: 703-648-4977
  Fax: 703-648-7757
  Email: dguberman@usgs.gov
  

• Thorium (Th)
  James B. Hedrick
  Phone: 703-648-7725
  Fax: 703-648-7757
  Email: jhedrick@usgs.gov
  

• Tin (Sn)
  James F. Carlin, Jr.
  Phone: 703-648-4985
  Fax: 703-648-7757
  Email: jcarlin@usgs.gov
  

• Titanium (Ti)
  Joseph Gambogi
  Phone: 703-648-7718
  Fax: 703-648-7975
  Email: jgambogi@usgs.gov
  

• Tripoli
  Thomas P. Dolley
  Phone: 703-648-7710
  Fax: 703-648-7975
  Email: tdolley@usgs.gov
  

• Tungsten (W)
  Kim B. Shedd
  Phone: 703-648-4974
  Fax: 703-648-7757
  Email: kshedd@usgs.gov
  

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  V

• Vanadium (V)
  Michael J. Magyar
  Phone: 703-648-4910
  Fax: 703-648-7757
  Email: mmagyar@usgs.gov
  

• Vermiculite
  Michael J. Potter
  Phone: 703-648-7723
  Fax: 703-648-7975
  Email: mpotter@usgs.gov
  

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  W

• Wollastonite
  Robert L. Virta
  Phone: 703-648-7726
  Fax: 703-648-7975
  Email: rvirta@usgs.gov
  

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  Y

• Yttrium (Y)
  James B. Hedrick
  Phone: 703-648-7725
  Fax: 703-648-7757
  Email: jhedrick@usgs.gov
  

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  Z

• Zeolites
  Robert L. Virta
  Phone: 703-648-7726
  Fax: 703-648-7975
  Email: rvirta@usgs.gov
  

• Zinc (Zn)
  Amy C. Tolcin
  Phone: 703-648-4940
  Fax: 703-648-7757
  Email: atolcin@usgs.gov
  

• Zirconium (Zr)
  Joseph Gambogi
  Phone: 703-648-7718
  Fax: 703-648-7975
  Email: jgambogi@usgs.gov
  

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