View allAll Photos Tagged graphite
one of many used as a moderating material in Enrico Fermi's first ever nuclear reactor, built in a squash court in Chicago in 1942. In the American Museum of Science and Energy, Oak Ridge, TN
Graphite from Ceylon (Sri Lanka).
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
Elements are fundamental substances of matter - matter that is composed of the same types of atoms. At present, 118 elements are known (four of them are still unnamed). Of these, 98 occur naturally on Earth (hydrogen to californium). Most of these occur in rocks & minerals, although some occur in very small, trace amounts. Only some elements occur in their native elemental state as minerals.
To find a native element in nature, it must be relatively non-reactive and there must be some concentration process. Metallic, semimetallic (metalloid), and nonmetallic elements are known in their native state.
The element carbon principally occurs in its native state as the minerals graphite (C) and diamond (C). Graphite is the common & far less valuable polymorph of carbon. Graphite has a metallic luster and a silvery-gray color. It is very soft (H = 1), has a slick, greasy feel, and readily marks paper. Graphite does have cleavage, but it is not apparent at the hand specimen scale. The ability of graphite to mark paper, its softness, and its greasy feel are all a consequence of cleavage sheets easily slipping over each other on a microscopic scale.
Locality: unrecorded / undisclosed site in Ceylon / Sri Lanka (attributed to "Colombo")
Pretty graphite stone earrings with a hint of sparkle! Great for everyday wear or dressing up!
The sterling silver hooks are handformed by me.
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black tigers eye (falcons eye)
glass
sterling silver
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Total length is 1 1/2 inches (4cm)
graphite on paper. first u draw with H9 the eye, and after it comes some B8 and it completes the background. the soft B8 will shine and shots are very difficult to take..
I wish I could remember what yarns I used for these... I think I used Panda Wool for the white. The design is by Red Bird Knits, and was nowhere near as hard as it looked!
Maybe my second pendant ever made that I could honestly label 'Unisex,' but I could see this looking great on a guy as well!
Dichroic glass stripes that shift from blues and green to golden yellow when moved.
Knitting up the Organic Man Pullover from Knitscene Winter '07/Spring'08 by Katie Himmelberg. Yarn is Blue Sky Alpacas Dyed Cotton in Graphite, very soft. I've been wanting to make this for Chuck since this issue came out and I'm hoping to get it done quickly, by Christmas, but if not his birthday is in January. And he's heard a lot about this sweater so it's no surprise, he helped pick out the color, etc.
P.S. It's so bright and sunny today!