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Written by GemEx Staff
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Friday, 10 July 2009 17:12 |
Graphene is a one-atom-thick planar sheet of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It can be viewed as an atomic-scale chicken wire made of carbon atoms and their bonds. The name comes from GRAPHITE + -ENE; graphite itself consists of many graphene sheets stacked together.
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Last Updated on Friday, 10 July 2009 20:17 |
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Written by GemEx Staff
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Friday, 26 June 2009 22:42 |
Lonsdaleite (named in honour of Kathleen Lonsdale), also called Hexagonal diamond in reference to the crystal structure, is an allotrope of carbon with a hexagonal lattice. In nature, it forms from graphite present in meteorites upon their impact to Earth.
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Last Updated on Tuesday, 30 March 2010 11:10 |
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Written by GemEx Staff
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Thursday, 28 May 2009 22:26 |
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Blue diamonds are some of the rarest and most expensive types of diamonds in the world today. These stones are famous for their different shades and for their value. Blue diamonds come in about six shades of blue. Some of the most esteemed ones come in the shade of deep blue.
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Last Updated on Wednesday, 08 July 2009 11:41 |
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Written by GemEx Staff
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Thursday, 28 May 2009 22:17 |
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When a couple is looking at engagement rings and wedding rings, they might be thrown off guard by the price tags attached and might also be unable to find just the right ring for their momentous occasion.In some particular case, they turn to loose diamonds, which allows them to buy the diamond separately and then have it placed in a setting of their choice. This often gives them a greater variety of options in the size and cut of the stone for a lesser price than one that is already chosen and set in a ring.
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Last Updated on Wednesday, 08 July 2009 11:41 |
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Diamonds
