DIMONDS rhomb is the best know gem. It is known as the mightiness of gems for its brilliance and for being the unassailableest mineral on demesne. (Foa, p.50) Its characteristics enable it to be used for many unalike purposes. Since rhombuss are the unvoicedest gems on Mohs scale, they take on useful tools for industrial purposes, such(prenominal) as drilling fractious materials. However, they are quite rare, which vexs them truly valuable. Their beauty and brilliance execute them perfect for jewelry. Â Â Â Â Â Â Â Â diamond is do up of carbon. An some other haoma of pure carbon is black lead. plumbago is the stable form of carbon, dumbfound up at the earths bulge. Despite the incident that they name identical chemical stub composition, the two minerals are drastically different. adamant is the hardest known substance and is usually light colorise and transparent, eyepatch graphite is greasy, easy powdered, and very dark in color. Diamond is the hardest gem on Mohs hardness scale and graphite is the softest. Diamond is very hard because of its dense packing and interlocking nuclear arrangement. Graphite, on the other hand, although it is the same element, is more generally jammed and has a six-sided, mold configuration, which makes it soft (Pough, 1991). The differences between graphite and diamonds are accounted for by the conditions in which they are created.
Diamonds form everyplace massive periods of time, between cytosine km and 200 km beneath the surface. At this peachy depth, carbon gets a risk to calm very gradually, forming diamond crystals. When volcanic goions occur, magma carries the diamonds up to the surface of the earth. Kimberlite lavas carrying diamonds erupt at anywhere between 10 and 30 km/hour and ontogeny their velocity to several c km/hour indoors the last few kilometers. (Pough, 44) At the surface, this lava cools and turns into Kimberlite rock. That is why... If you indispensableness to get a full essay, order it on our website:
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