Diamond
In mineralogy, diamond (from the ancient Greek αδάμας – adámas "unbreakable") is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions. Diamond is renowned as a material with superlative physical qualities, most of which originate from the strong covalent bonding between its atoms. In particular, diamond has the highest hardness and thermal conductivity of any bulk material. Those properties determine the major industrial application of diamond in cutting and polishing tools and the scientific applications in diamond knives and diamond anvil cells.
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Famous quotes containing the word diamond:
“I really think that American gentlemen are the best after all, because kissing your hand may make you feel very very good but a diamond and a sapphire bracelet lasts forever.”
—Anita Loos (1893–1981)
“Every time an ashtray is missing from a hotel, they don’t come looking for you. But let a diamond bracelet disappear in France and they shout John Robie, the Cat. You don’t have to spend every day of your life proving your honesty, but I do.”
—John Michael Hayes (b.1919)
“pulling off the fat diamond engagement ring,
pulling off the elopement wedding ring,
and holding them, clicking them
in thumb and forefinger,
the indent of twenty-five years,
like a tiny rip leaving its mark....”
—Anne Sexton (1928–1974)