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DIAMOND - LoveToKnow Article on DIAMOND (Site not responding. Last check: 2007-10-11) |
 | | In oxygen or air diamond burns at about 850, and only continues to do so if maintained at a high temperature; but in the absence of oxidising agents it may be raised to a much higher temperature. |
 | | Carbonado or fl diamond, found in Bahia (also recently in Minas Geraes), is a fl material with a minutely crystalline structure somewhat porous, opaque, resembling charcoal in appearance, devoid of cleavage, rather harder than diamond, but of less specific gravity; it sometimes alisplays a rude cubic crystalline form. |
 | | At So Joho da Chapada, in Minas Geraes, diamonds occur in a clay interstratifiecf with the itacolumite, and are accompanied by sharp crystals of rutile and haematite in the neighborhood of decomposed quartz veins which intersect the itacolumite. |
| 11.1911encyclopedia.org /D/DI/DIAMOND.htm (7492 words) |
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