where were the first diamonds found?What are diamonds made of?When were diamonds formed?WhyAreDiamondsSoXspenv
413769
diamonds are just carbon atoms that are compressed so much that they become clear and shiny... theyre expensive because they are rare and very difficult to mine... they are often formed in places where there is a lot of heat and pressure such as deep down in earth... nobody knows where diamonds were first found cause they are so old that they date back to before there were and major written records
246934
A crystal is a type of structure. What makes something diamond, sapphire, quartz, etc, is its chemical composition.
1068395
My mate works in a Diamond specialists. They grade, buy and sell diamonds. He started out just getting a job in good quality jewellers. He learnt from the other guys and worked in progressively more specialist shops. About three in total I think.\n\nHe is just about to complete his diamond grading course in London (where he was just offered a job on £40,000 a year, not bad for a 24 year old).
965654
I would have said Diamonds but I just found this from physicsweb.org:\n\n    Diamonds are not forever\n\n    Physicists in Germany have created a material that is harder than diamond. Natalia Dubrovinskaia and colleagues at the University of Bayreuth made the new material by subjecting carbon-60 molecules to immense pressures. The new form of carbon, which is known as aggregated diamond nanorods, is expected to have many industrial applications (App. Phys. Lett. 87 083106).\n\n    The hardness of a material is measured by its isothermal bulk modulus. Aggregated diamond nanorods have a modulus of 491 gigapascals (GPa), compared with 442 GPa for conventional diamond. Dubrovinskaia and two of her co-workers - Leonid Dubrovinky and Falko Langenhorst - have patented the process used to make the new material.\n\n    Diamond derives its hardness from the fact that each carbon atom is connected to four other atoms by strong covalent bonds. The new material is different in that it is made of tiny interlocking diamond rods. Each rod is a crystal that has a diameter of between 5 and 20 nanometres and a length of about 1 micron.
762355
Diamonds are plentiful. The reason why the price is so high is because there are very few "families" that actual run the diamond mines. The DeBeers (not sure of spelling) family is one that basically owns 99% of the diamond mines in South Africa. They have gone to great lengths to make sure they are one of the few diamond brokers in the world. Great lengths is an understatement, for much of what they have supposedly done would be illegal if these mines where in the US. It's basically a "turf war". That said, diamonds aren't rare nor precious. \nAs for price, you can find cheap diamonds but the cheaper...the less "perfect" in the three C's. Clarity, Cut and Carat (don't quote me because the last C always gets me). \n\nDon't waste a dime unless you plan on dropping big coin on a perfect stone.
542643
People useally know that Carbon exist in forms of graphite and diamond. graphite and diamond are the two naturally occuring forms of carbon.  However back in 1985, Robert Curl, Harold Kroto and Richard Smalley, were able to create third allotrope of carbon, Buckminsterfullerenes also known as Buckyball using Using laser evaporation of graphite!  The structure of C60 is a truncated icosahedron, which resembles a round soccer ball of the type made of hexagons and pentagons, with a carbon atom at the corners of each hexagon and a bond along each edge.\n\nSince its invention/discovery, much research has been done to create more allotropes of carbon.  The nano technology you hear today has its roots in discovery and concepts of buckyball.
881405
1. A diamond is a specific type of crystal form of Carbon (contrary to what some people say and what some have answered:  a diamond was NEVER coal -- the only similarity is that they both contain carbon.)\n2. You cannot "make" a diamond out of a crystal.\n3. You can try to cut a crystal to maybe resemble a cut diamond, but no one would ever confuse the two.\n4. Crystals have certain alignments of the crystal facies along which the crystal will split -- it is along these facies that an expert will "cut" a crystal to get a specific shape.
203014
it takes certain conditions like heat and pressure over a million years deep underground.\n\nHowever, this same conditions can be done in a lab in a few hours, this is how many industrial diamonds are made. However, they are still expensive since the energy costs are so high...
439535
Diamond, Graphite, and Buckministerfullerene are all types of carbon, which means that they are arrangements of carbon atoms with only carbon-carbon bonds. \n\nYou are made of organic compounds with carbon-oxygen, olefin, carbon-hydrogen, oxygen-phosphoros, etc bonds. The carbon that exists within you is the same carbon in diamond or bucky balls; It's just bound in a different way.
697410
A diamond is a crystal structure, and thus, exists only as a solid.  If you melt or boil a diamond (at incredibly high temperature) it is no longer a diamond, but carbon.
15296
Here is the exact answer you need:\n\nOn the basis of their macroscopic properties, it seems impropable that diamonds and graphite are made of exactly the same atoms. This begs the question, how do we know that diamonds are indeed carbon? Surprisingly, this has been known for over 200 years. In 1772 (before the signing of the Declaration of Independence) a talented French chemist, Antoine Lavoisier, burned diamond (ca. 150 milligrams) in a sealed container. Diamonds do not burn readily, so Lavoisier used the high heat provided by a large lens placed in the sunlight. By a simple analysis of the gases produced by burning, Lavoisier determined that the gas we now know as CO2 was produced. Furthermore, the same amount of this gas was produced when 150 milligrams of amorphous carbon in the form of charcoal was burned. Thus, Lavoisier concluded that charcoal and diamond are the same. However Lavoisier was reluctant to publicize such a radical and counterintuitive result. It took more than 20 years before Lavoisier's conclusions were confirmed by Tenant, an English chemist. Let us examine Lavoisier's conclusion in the context of the times. Lavoisier's discovery predated Dalton's formulation that all matter is made of elements by 29 years and Mendeleev's formulation of the periodic table by almost 100 years. Our modern understanding of chemistry allows us to formulate Lavoisier's experiments in a compact way, the chemical equation.\n\n\n\n\n\nThese equations indicate that burning either diamond or graphite causes the bonds of the reactants (the carbon material and dioxygen) to be rearranged to form the product (CO2) and energy in the form of heat. In general, a chemical reaction involves changes in the bonding between atoms in going from reactants to products. Let's contrast these combustion equations with the analogous equation for burning buckyballs.\n\n\n\nNote how the buckyball equation has a subscript of 60 on the carbon, indicating that this form of carbon is molecular. As a result, 60 dioxygen molecules are required to convert the sixty atoms of carbon in each buckyball into 60 molecules of CO2. In a proper, balanced chemical equation the number and types of atoms on the reactant (left) side of the equation equal those on the product (right) side. Because heat is released in this chemical reaction, heat is written as a product. Reactions that generate heat are called exothermic.\n\n\nHope this is enough.
438769
Carbon has been known since ancient times.  Diamond and graphite both occur readily in nature.
165956
Look at this site for all your needs of the subject:\n\nhttp://en.wikipedia.org/wiki/Diamond
518764
Earth wasn't invented (at least not if you listen to common sense), it was created from abiotic (non-living) sources. It started when hydrogen and helium clouds turned into stars because of their gravitational force. These stars then developed other simple elements like oxygen, nitrogen and carbon (necessary for organic compounds) these brought about nebulas which made simple compounds. Eventually matter formed into large masses that became planets, comets, and asteroids.
99998
Yes, diamonds are more abundant than we are lead to believe.  De Beers controls most of the diamond trade.\n\nI first saw this on the PBS TV show Nova a few years back:\nhttp://search.yahoo.com/search?ei=utf-8&fr=slv1-&p=nova%20de%20beers\n\nThe Yahoo Searches below lead to articles on the scarcity (or lack there of) and abundance of diamonds.
863045
Life would be unrecognizable. Diamonds are the corner-stone (sorry for the pun) of modern high tec industry. They are used in everything from making cars to producing contact lenses, from heavy industry to neuro-surgery. In some applications they can be replaced by other hard materials but the equipment has to run slower and it wears out in a fraction of the time. All in all  much of what we  regard as "normal" today would not be here without diamond technology.
499285
It depends on what you mean by "simulated" diamonds.  If you mean something like cubic zirconium then the answer is no, they are not real diamonds.  However, if you mean man made diamonds, then the answer is yes, they are real diamonds.  Man made diamonds are made of the same material, have the same crystalline structure and have all of the same characteristics as a natural diamond.  Its simply a matter of them having been formed in a laboratory and "real" or natural diamonds having formed in nature.  Both methods require extreme heat and pressure but yield the same material.  Man made diamonds have fewer inclusions and flaws than natural diamonds.  A man made diamond,even though it is the exact same thing as a natural diamond, can only be sold as a man made diamond and can never be represented as a natural diamond.