Q: Is a diamond less stable than graphite? ¶
A: Yes, but the conversion rate from diamond to graphite is negligible at standard conditions.
Q: Are diamonds yellow and are produced by so-called high-pressure high-temperature processes? ¶
Q: Is a diamond a transparent crystal of tetrahedrally bonded carbon atoms in a covalent network lattice that crystallizes into the diamond lattice which is a variation of the face centered cubic structure? ¶
Q: Are diamonds formed at high temperature and pressure at depths of 140 to 190 kilometers in the Earth's mantle? ¶
Q: Are diamonds not very reactive? ¶
Q: Are diamonds transparent and colorless? ¶
Q: Is a diamond derived from the ancient Greek αδάμας , "proper", "unalterable", "unbreakable", "untamed", from ἀ- , "un-" + δαμάω , "I overpower", "I tame"? ¶
A: Yes, Diamonds are thought to have been first recognized and mined in India, where significant alluvial deposits of the stone could be found many centuries ago along the rivers Penner, Krishna and Godavari.
Q: Are diamonds valued mostly for their hardness and thermal conductivity? ¶
A: Yes, and making many of the gemological characteristics of diamonds, such as the 4 Cs, irrelevant for most applications.
Q: Are diamonds generally small? ¶
A: Yes, and perfect to semiperfect octahedra, and are used to polish other diamonds.
Q: Are diamonds known as a primary source of diamonds? ¶
Q: Are diamonds brought close to the Earth's surface through deep volcanic eruptions by magma? ¶
A: Yes, and which cools into igneous rocks known as kimberlites and lamproites.
Q: Is a diamond chemical vapor deposition? ¶
A: Yes, The growth occurs under low pressure. It involves feeding a mixture of gases into a chamber and splitting them to chemically active radicals in a plasma ignited by microwaves, hot filament, arc discharge, welding torch or laser.
Q: Were diamonds found in 1725? ¶
Q: Is a diamond forever""? ¶
A: Yes, This slogan is now being used by De Beers Diamond Jewelers, a jewelry firm which is a 50%/50% joint venture between the De Beers mining company and LVMH, the luxury goods conglomerate.
Q: Are diamonds diamonds manufactured in a laboratory? ¶
A: Yes, as opposed to diamonds mined from the Earth.
Q: Are diamonds located in the diamond-rich density fraction with the help of X-ray fluorescence? ¶
A: Yes, after which the final sorting steps are done by hand.
Q: Are diamonds mined annually? ¶
A: Yes, and with a total value of nearly US$9 billion, and about 100,000 kg are synthesized annually.
Q: Is a diamond produced annually for industrial use , 90% of which is produced in China))? ¶
A: Yes, Approximately 90% of diamond grinding grit is currently of synthetic origin.
Q: Is a diamond renowned as a material with superlative physical qualities? ¶
A: Yes, and most of which originate from the strong covalent bonding between its atoms.
Q: Is a diamond shaped in numerous stages of polishing? ¶
Q: Are diamonds converted into gems through a multi-step process called "cutting"? ¶
A: Yes, Diamonds are extremely hard, but also brittle and can be split up by a single blow.
Q: Are diamonds not truly black? ¶
A: Yes, but rather contain numerous dark inclusions that give the gems their dark appearance.
Q: Are diamonds natural semiconductors? ¶
A: Yes, and in contrast to most diamonds, which are excellent electrical insulators.
Q: Are diamonds formed from highly compressed coal? ¶
Q: Is a diamond not suitable for machining ferrous alloys at high speeds? ¶
A: Yes, as carbon is soluble in iron at the high temperatures created by high-speed machining, leading to greatly increased wear on diamond tools compared to alternatives.
Q: Are diamonds poorly defined and partly depends on market conditions? ¶
A: Yes, Within the category of industrial diamonds, there is a sub-category comprising the lowest-quality, mostly opaque stones, which are known as bort.
Q: Are diamonds sold? ¶
A: Yes, and including auction sales.
Q: Are diamonds partially oxidized? ¶
Q: Are diamonds largely consolidated in the hands of a few key players? ¶
A: Yes, and concentrated in traditional diamond trading centers, the most important being Antwerp, where 80% of all rough diamonds, 50% of all cut diamonds and more than 50% of all rough, cut and industrial diamonds combined are handled.
Q: Is a diamond followed by brown? ¶
A: Yes, and colorless, then by blue, green, black, pink, orange, purple, and red.
Q: Are diamonds fancy-colored? ¶
A: Yes, while only 0.01% of natural diamonds are.
Q: Was a diamond sold for $10? ¶
Q: Is a diamond known as a paragon? ¶
Q: Were diamonds found only in alluvial deposits in Guntur and Krishna district of the Krishna River delta in Southern India? ¶
Q: Are diamonds subjects of frequent controversy such as concerns over the sale of blood diamonds or conflict diamonds by African paramilitary groups? ¶
Q: Are diamonds more likely to be handled in Europe or North America? ¶
Q: Are diamonds brown? ¶
Q: Are diamonds naturally lipophilic and hydrophobic? ¶
A: Yes, and which means the diamonds' surface cannot be wet by water but can be easily wet and stuck by oil.
Q: Are diamonds sold newly polished, there is a well-established market for resale of polished diamonds? ¶
A: Yes, One hallmark of the trade in gem-quality diamonds is its remarkable concentration: wholesale trade and diamond cutting is limited to just a few locations; in 2003, 92% of the world's diamonds were cut and polished in Surat, India.
Q: Is a diamond the hardest known natural material on both the Vickers and the Mohs scale? ¶
Q: Are diamonds cut and polished in preparation for sale as gemstones? ¶
A: Yes, The cutting and polishing of rough diamonds is a specialized skill that is concentrated in a limited number of locations worldwide.
Q: Is a diamond composed of carbon? ¶
Q: Is a diamond reexamined for possible flaws? ¶
A: Yes, and either remaining or induced by the process.
Q: Are diamonds not used to fund criminal or revolutionary activities? ¶
Q: Are diamonds stable? ¶
Q: Are diamonds certificated by the government of the country of origin? ¶