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minerals

August 1, 2018 by wpengine

Manhattan Project Glass

By Debra Wilson

Manhattan Project glass specimen

The Section of Minerals collection contains many specimens with interesting stories of historical significance. One such story is about an unusual faceted stone.

As part of the Manhattan Project, the mission of the Hanford Site in Benton County, Washington was to produce plutonium for the atomic bomb. This included the first bomb tested at Trinity Site in New Mexico and the Fatman bomb that was dropped on Nagasaki to end World War II in 1945. The viewing windows that the scientists looked through in the chemical processing buildings (AKA plutonium recovery buildings, where the plutonium was being extracted from the fuel rods) were made of 70% lead to protect them from the highly radioactive material they were working with.

When the buildings began being salvaged in 1990, five of these radiation windows were sent to a salvage yard in Walla Walla, Washington, where they were stored in a warehouse. Sometime during the two decades of storage one of the panes shattered. When the broken pieces were sold, Patrick Kelley of PAK Designs in North Carolina was able to acquire two pieces. He faceted the Rectangular Baguette Cut, 51.4 carat gemstone in 2013 that now resides in the Section of Minerals collection. Note the yellow color of the glass due to the high lead content.

This stone is now on display in the Treated & Synthetic Stones case in Wertz Gallery.

Debra Wilson is the Collection Manager for the Section of Minerals at Carnegie Museum of Natural History. Museum employees are encouraged to blog about their unique experiences and knowledge gained from working at the museum.

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Carnegie Museum of Natural History Blog Citation Information

Blog author: Wilson, Debra
Publication date: August 1, 2018

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Filed Under: Blog Tagged With: Debra Wilson, gems and minerals, Hillman Hall of Minerals and Gems, minerals

July 2, 2018 by wpengine

Wire Silver

image

You might not recognize these at first glance, but these new specimens in Hillman Hall are a common metal: silver. Wire silver from China to be exact. It is hard to imagine pieces like these are the same material as delicate jewelry, isn’t it? Get a close look at these specimens in the Native Elements case in the Systematic Collection.

Photo by Debra Wilson, Collection Manager, Section of Minerals

Filed Under: Blog Tagged With: gems and minerals, Hillman Hall of Minerals and Gems, minerals

June 25, 2018 by wpengine

Pyromorphite from Zambia

Pyromorphite from Zambia

Scanning electron microscope analysis has revealed that one of the specimens in our Phosphates case isn’t exactly what we thought it was at first.

Mimetite from Zambia is actually Pyromorphite from Zambia.

Many mimetite and pyromorphite specimens are nearly indistinguishable. Both are six-sided crystals that come in colors like yellow, orange, brown, and green. They are brittle with similar levels of hardness and transparency. Energy-Dispersive X-ray Spectroscopy (EDS) was performed on this specimen using a Scanning Electron Microscope (SEM) which found levels of O (oxygen), Pb (lead), Cl (chlorine), and P (phosphorus) consistent with pyromorphitePb5(PO4)3Cl. Mimetite is Pb5(AsO4)3Cl.

See Pyromorphite Zambia on display in Hillman Hall of Minerals and Gems in the Systematic Collection.

Photo by Debra Wilson, Collection Manager, Section of Minerals

Filed Under: Blog Tagged With: gems and minerals, Hillman Hall of Minerals and Gems, minerals

March 5, 2018 by wpengine

Necklace Made of Sardonyx

orange necklace made of sardonyx beads

This necklace made of sardonyx, a type of cryptocrystalline quartz, is on display in Wertz Gallery of Gems and Jewelry.

Quartz has unlimited variations in color and form, making it valuable to human culture since ancient times in everything from jewelry, to arrowheads, to metalworking.

(photo by Debra Wilson)

Filed Under: Blog Tagged With: Deb Wilson, gems and minerals, minerals, Wertz Gallery

March 1, 2018 by wpengine

Section of Minerals Collection Manager, Deb Wilson, attends…

copper specimen

copper specimen purchased at the show

Deb Wilson at the show

visitors browsing the gem and mineral show

Deb Wilson with other visitors to the show

Section of Minerals Collection Manager, Deb Wilson, attends the Tucson Gem and Mineral Show every year. This year Deb Wilson acquired a beautiful piece of copper that was mined out of Bisbee, Arizona in 1910, which is now on display in Hillman Hall of Minerals and Gems.

 

Filed Under: Blog Tagged With: Deb Wilson, Hillman Hall, minerals

February 19, 2018 by wpengine

Designer Cell Phone Cover? Not quite.

moss agate

Check out the intricate and beautiful patterns in this moss agate found in India.

It may look like it would make a great case for your iPhone in this picture, but it’s much smaller, only about two inches, in real life! Come see it for yourself at Carnegie Museum of Natural History!

(photo by Debra Wilson)

Filed Under: Blog Tagged With: gems and minerals, minerals

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