here it is;
diamond;
native carbon.the same element occurs in tnhe form of graphite,another mineral with completely different characteristics and appearance,its name comes from the greek-adamas-,meaning"invincib... in recognition of its exceptional hardness,wich makes it resist any form of abrasion by other minerals
Crystal system=Cubic
Appearance-diamonds modt commonly occur as isolated crystals,wich may be in the form of a more or less perfect octahedron an octahedron with curved faces,or some times an icisitetrahedron or hexoctahedron,wich are more complex forms somewhat similar to an octahedron.can also be in the form of a
rhombic dodecahedron or a tetrahexahedron with rounded corners and slightly curved faces, to the point of being almost spherical,certain flattened,basically triangular twined forms are also frequent
Physical properties-=diamonds are rated 10 on Mohs' scale of hardness.Its the only mineral with this degree of hardness,altough such a property is difficult to quantify.Depending on the methods of measurement, it is estimated to be from 10 to 150 times harder than corundum,the only mineral with a hardness of 9.because al the remaining mineral have a hardness of less than 9, clearly there is a vast difference between them and diamond.But diamond has fairly
easy cleavage pararell to the octahedral faces,wich can make it brittle.The density is 3.52 g·cm−3.the refractive index of n2.417 is well in excess of the measuring capabilities of the average refractomer,singly refractive,diamonds crystals can display areas of anomalous birefringence.it has fairly high disprersion,equal to 0.044,wich is the highest for colorless minerals(the effect of dispersion is not appreciated in colored stones so it is not considered)
2007-01-22 11:32:46
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answer #1
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answered by Byzantino 7
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Composition - Carbon. Hardness - 10. Luster - Adamantine. Streak - None (Diamond is so hard it scratches everything and doesn't leave a streak). Cleavage - perfect in three directions.
2007-01-22 10:29:41
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answer #2
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answered by Amphibolite 7
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composition is the act of combining parts or elements to form a whole. Hardness, the comparative ability of a substance to scratch or be scratched by another. Compare Mohs scale. luster the nature of a mineral surface with respect to its reflective qualities: greasy luster. Streak the line of powder obtained by scratching a mineral or rubbing it upon a hard, rough white surface, often differing in color from the mineral in the mass, and serving as an important distinguishing character.
Cleavage the tendency of crystals, certain minerals, rocks, etc., to break in preferred directions so as to yield more or less smooth surfaces (cleavage planes). Fracture When bonds between atoms are approximately the same in all directions within a mineral, breakage occurs either on irregular surfaces (splintery or irregular fracture) or along smooth, curved surfaces (conchoidal fracture), similar to those formed when thick pieces of glass are broken.
2007-01-22 10:26:42
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answer #3
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answered by A~Nnacho 2
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Composition- carbon.
Hardness- Hardest of all substances.
Sorry thats all.
2007-01-22 10:25:31
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answer #4
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answered by graham 2
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carbon, 10 (perfect), adamantine to waxy, white, 4 (octahedron).
2007-01-22 10:24:51
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answer #5
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answered by Anonymous
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Try and google "diamond physical properties" and see what you find.
2007-01-22 10:24:38
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answer #6
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answered by hcbiochem 7
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