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Diamond is extremely strong owing to its crystal structure, known as diamond cubic, in which each carbon atom has four neighbors covalently bonded to it. Bulk cubic boron nitride (c-BN) is nearly as hard as diamond. Diamond reacts with some materials, such as steel, and c-BN wears less when cutting or abrading such material. [4]
A superhard material is not necessarily "supertough". For example, the fracture toughness of diamond is about 7–10 MPa·m 1/2, [16] [17] which is high compared to other gemstones and ceramic materials, but poor compared to many metals and alloys – common steels and aluminium alloys have the toughness values at least 5 times higher. [18]
Diamonds have high monetary value as one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light—giving the diamond its characteristic "fire"—make it useful for industrial applications and desirable as jewelry. Diamonds are such a ...
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Main diamond producing countries. Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic.Diamond as a form of carbon is tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water.
Diamond expert Dan Moran told Yahoo News that while he generally agrees that younger and “less established” clients are more likely to go for lab-grown diamonds, he’s been told by “many ...
Other experts far from the quaint, tucked-away alley concurred, including an ex-jewel thief, and the writer of a book about an infamous 2003 diamond heist in Antwerp, Belgium, the epicenter of the ...
Diamond manufacturers make a groove in the diamond with a laser or saw or another diamond, and then split the diamond by placing a steel blade in the groove and giving a gentle tap. [8] Cleavage can be along any of the four planes parallel to the faces of an octahedral diamond (i.e. perpendicular to body diagonals of the unit cell).