How to realize that a rock is definitely a diamond?
405248
The standard way of testing if something is diamond is to do the scratch test.  Because diamond is so hard only diamond will scratch diamond.  There are more technical methods to determine phase, e.g. X-ray diffraction, Spectroscopy techniques etc. but I guess that they are not available to you.
655958
The average diamond is approximately 3 billion years old. Some newer some older. Thats about 2/3 the age of the planet.\nDiamonds are not created in the earths crust, but rather deep in the earths mantle at about 1800 degrees F. The diamonds are brought to the surface by volcanic activity.
305755
Why not take a page from Archimedes' Eureka! moment?\n\nMeasure the density, then ask a jeweler.
93827
Diamond. It is pure carbon.
327691
Lab diamonds (brand name diamonique) are chemically like diamonds from nature except that they are perfect, unlike natural diamonds which have subtle imperfections.  They are cheaper because, unlike their natural counterparts that take thousands of years and the perfect set of conditions to form,  man-made diamonds can be grown in hours/days (1 karat in 24 hours)....and it requires a lot less people, which means less paychecks.
508159
Check out:\n\nhttp://en.wikipedia.org/wiki/Diamond
386776
ebay, just make sure you note that it is REAL diamond jewelry--there's a lot of fake stuff on there, so point out that yours isn't CZ in the description and put "REAL AUTHENTIC DIAMOND" in the headline
6106
That is OBViOUS. It's The Rock. Duh.
154854
its a f-----ing diamond or a crystal.
495467
http://www.acstones.com/gemofmonth/2001/gemofmonth.8.01.html
725985
Hi. Sometimes its the difference between being married or getting divorced. An acquaintance bought a tennis bracelet for his wife, Three of the stones were diamonds (out of about twenty). He knew which ones were real. His wife, a little concerned with how much it cost, asked it the stones were real and the guy said yes, proving it by scratching glass with two or three of the stones. He almost got away with the lie but his wife, not wanting to lose the value if the bracelet was stolen, had it appraised for insurance. The divorce soon followed. Here is a link : http://www.answers.com/main/ntquery?s=Cubic%20zirconium&gwp=16
605675
First of all most stones will scratch glass...A cubic zirconia sapphire and ruby and quite a few other stones are harder than glass...A diamond can be broke by just banging it into you car door accidentally and I have seen that happen...Unless you have some pretty special equipment or a lot of knowledge at what you are looking at your not going to ever be certain...Take it to a jeweler and have them look at it or even a pawn shop, usually they have a tester they can touch the stone with and know in a second if its real or not without having to get a real appraisal and they will probably do it for you for free
695794
Naturally this depends on what type "dirt" you are sifting.   Diamonds are typically only found in certain types of "dirt".  The most common type of diamond-containing material is a clay mineral called Kimberlite, sometimes found in tube-like structures associated with volcanic activity.  Your chances at finding a diamond will also increase if you are sifting "dirt" that once was at great depth underground, where geo-pressure was high enough to create the crystal.  If you are sifting "dirt" from, for instance the California desert, pack a lunch.  You'll be at it a while
362268
If you get your diamond appraised at your local jewellers & they appraise the diamond through one of the gemmological laboratories (for example EGL, GIA etc) then they provide a laminated certificate with the diamond grading info plus you can look it up on their websites following receiving the certificate by entering the certificate number given to you. Hope this helps!
508527
Yes, a black di<b>a</b>mond is a real diamond. It is just has some other mineral in with it, that is what gives it the black color. The Canary diamonds, a yellow tinged diamond, have a similar property.\nALSO. Kimberlite ore, a substance often found around diamonds, is black. If this a a rock that you actually have, then you may have a piece of kimberlite.
260543
Rocks don't grow, but crystals do.  However, crystals only grow when they are imersed in the medium that contains its essential elements. You should measure it over time. It would be more accurate and convincing than just by looking at it.
1120366
1. The difference between rocks & minerals\nhttp://www.rocks-and-minerals.com/ gives a simple but good explanation of the difference between rocks & minerals.\n\nIt is not easy to tell the difference between rocks & minerals because there are so many kinds of them. It takes years of study to be able to accurately identify a mystery rock and even then rockhounds want to know where the specimen came from. \n\nRocks\nAll rocks are made of 2 or more minerals, but minerals are not made of rocks. To see some pictures of different kinds of rocks, click here.\n\nRock Words: There are many common names for rocks and the usually give you an idea of how big the rock is. Here are a few:\n boulder - large, taller than a person \n rock - large, you could get your arms around it or a bit smaller but it is usually jagged, broken off a bigger piece of rock  \n river rock - round rocks that are along the edge & at the bottom of fast-flowing rivers  \n stone - medium, you could hold it in two hands  \n pebble - small, you can hold it with two fingers, could get stuck in your shoe, usually rounded  \n sand - made up of tiny pieces of rock, grains of sand  \n grain - tiny, like a grain of rice or smaller, often found on a beach  \n dust - really fine powder that is mixed in with sand or soil  \n mountain - huge, giant hunk of rock that is still attached to the earth's crust, doesn't move, tall  \n\n\nFor an excellent Rock Identification test, click on http://www.bwctc.northants.sch.uk/html/projects/science/ks34/rocks/key.html\n\n \n\nMinerals\nA mineral is the same all the way through. That is one reason we speak of a sample or a specimen rather than a rock. There are about 3000 known minerals on earth. Al rocks are made up of 2 or more of these minerals. To find out more about different kinds of minerals, click here.