<h3>How do black diamonds differ chemically from real diamonds?</h3>
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<strong>Central African Republic best answer:</strong>
<p><i>Answer by Alec</i><br/>"Carbonado, commonly known as the 'Black Diamond,' is a natural polycrystalline diamond found in alluvial deposits in the Central African Republic and Brazil. Its natural colour is black or dark grey, and it is more porous than other diamonds." - Wikipedia
Polycrystalline means that there are many many little diamond crystals that are stuck together with small graphytic molecules. Normal diamonds are "single" crystals - which means the the whole thing has a latticed 3D structure which repeats throughout. Polycrystalline diamonds have much different physical properties - read the Wikipedia article for further info.</p>
<p><strong>Internally displaced in CAR, near Paoua 13</strong>
<img alt="Central African Republic" src="http://farm2.staticflickr.com/1364/1396224521_6a2cd3141e.jpg" width="400"/><br/>
<i>Image by <a href="http://www.flickr.com/photos/8788342@N08/1396224521">hdptcar</a></i>
A child who has been displaced with his family stands in the rain. Internally displaced persons in the north of the Central African Republic live under harsh conditions: Often they don't have access to hospitals, there is no clean water, and their children cannot go to school. August 2007 (c) UNHCR / Nicolas Rost</p>
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