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Close up of Specularite
March 23, 2017

Specularite

Mineral: Specularite (a variety of Hematite)
Mineral Origin: Republic Mine, MI
Primary Mineral Commodity: Iron
Commodity Uses: Steelmaking

Close up of Conglomerate (Gold Ore)
March 23, 2017

Conglomerate (Gold Ore)

Rock: Conglomerate (Gold Ore) Contains sediments of Precambrian age; contains about 8 grams of gold per ton of rock.
Mineral Origin: Witwatersrand formation, South Africa. The gold in the Witwatersrand Basin area was deposited in Archean river deltas having been washed down from surrounding gold-rich greenstone belts to the north and

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Close up of Silver
March 23, 2017

Tetrahedrite

Mineral: Tetrahedrite (a copper antimony sulfosalt)
Mineral Origin: Bingham Canyon, UT
Main Commodity: Silver
Uses: electric wiring and silver-based inks create electrical pathways in electronics; jewelry, mirrors, coins, in photovoltaic cells to transform sunlight into electricity.

Close up of Feldspar
March 23, 2017

Feldspar

Mineral: Feldspar
Primary Commodity: Feldspar
Primary Commodity Uses: Feldspar is one of the most common minerals on the planet and is mostly used for glassmaking and ceramics.

Close up of Garnet Schist
March 23, 2017

Garnet Schist

Mineral: Garnet Schist
Primary Commodity: Garnet
Primary Commodity Uses: Garnet is mostly used for abrasives, water filtration, and some electronics

Close up of Silicon Carbide
March 23, 2017

Silicon Carbide

Mineral: Silicon Carbide
Mineral Origin: Sample donated by Norton Company
Primary Commodity: Silica (abrasive)
Primary Commodity Uses: Just as their name implies, abrasives are used to abrade, clean, etch, grind, polish, scour, or otherwise remove material

Close up of Silicon Carbide
March 23, 2017

Silicon Carbide

Mineral: Silicon Carbide
Mineral Origin: Sample donated by Norton Company
Primary Commodity: Silica (abrasive)
Primary Commodity Uses: Just as their name implies, abrasives are used to abrade, clean, etch, grind, polish, scour, or otherwise remove material

Close up of Silicon Carbide
March 23, 2017

Silicon Carbide

Mineral: Silicon Carbide
Mineral Origin: Sample donated by Norton Company
Primary Commodity: Silica (abrasive)
Primary Commodity Uses: Just as their name implies, abrasives are used to abrade, clean, etch, grind, polish, scour, or otherwise remove material

February 23, 2017

PubTalk 2/2017 — Geology up-close

  • How does a scanning electron microscope (SEM) work?
  • What does USGS study with the SEM?
    • Earthquakes
    • Volcanoes
    • Mineral and energy resources
    • Soil and aquifer processes

By Leslie Hayden, USGS Geologist, Diane Moore, USGS Geologist, Kathryn Watts, USGS Research Geologist, Marjorie Schulz, USGS Research

Scintillometer sitting on top of a rock outcropping surrounded by trees
February 17, 2017

Torrs of the Ruby Batholith

Scintillometer and torrs of the Melozitna granite in the Ruby batholith.  This granite contains abundant monazite and high levels of thorium and rare earth elements. This area is part of the Bureau of Land Management's Central Yukon Planning Area, which USGS did a mineral assessment of in 2015.

January 27, 2017

NMIC - 2017 Mineral Commodity Summaries Release

The National Minerals Information Center, the primary agency for collecting and analyzing nonfuel minerals information, releases the 2017 Mineral Commodity Summaries, a collection of reports on over 85 commodities essential to the U.S. economy and national security.

Image shows a sample of clinozoisite against a black background
December 31, 2016

Clinozoisite

This sample is clinozoisite, a calcium aluminum silicate mineral. It is mostly prized as a collectors mineral rather than a source of its industrial mineral commodities.

Sample provided by Carlin Green, USGS. Sample originated from Hachupa, Pakistan, and is 6.0cm in size.