2007-12-18 21:48:11 · 8 answers · asked by truthseekers 2 in Science & Mathematics ➔ Earth Sciences & Geology
Well, they prove it's a real diamond. The black spots are graphite or carbon crystals. If you can see a fair number with the naked eye, then the diamond is at the lower end of the value scale. Greater clarity = higher value.
2007-12-18 21:55:46 · answer #1 · answered by Anonymous · 1⤊ 1⤋
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My antique diamond has black spots in it,how does this occur and does it render it worthless?
2015-08-14 05:02:18 · answer #2 · answered by Anonymous · 0⤊ 0⤋
A few definitions first.
Inclusions are characteristics that are not on the surface, they are inside the diamond or reach out from inside to the surface of the diamond, for example a crystal inside the diamond. Blemishes are characteristics that only are present at the surface like a scratch, and have no apparent depth.
Many diamonds have black inclusions, in many cases they prove the diamond is natural when these inclusions are included crystals. Synthetic diamonds can have black inclusions too, usually they are metallic particles left behind by the manufacturing process. These are usually flat, like small metal sheets, usually very regular in shape.
Usually, included crystals in natural diamonds are irregular and certainly 3 dimensional in shape.
The inclusions don't make your diamond worthless. They are only one parameter in the value of your diamond.
In the 4 C's that affect the diamonds value, the carat weight, cut, color and clarity, indeed the clarity has its impact. The clarity is defined as the relative abscence of clarity characteristics (blemishes and inclusions). The parameters for these are their position (worse under the table facet, better below facets closer to the girdle), number (less is better), size (smaller is better), color (less color is better), their nature (type of inclusion).
Diamonds without inclusions are rare and very valuable, most diamonds have inclusions.
The characteristics are graded with a loupe or other magnification of 10 X.
As the diamond crystal grows over millions of years, some other elements can be surrounded and finally included, hence included crystals.
2007-12-18 22:59:31 · answer #3 · answered by Philip H 4 · 6⤊ 0⤋
No.
Carbon Spots: Black spots in diamonds, usually caused by the presence of transparent crystals within the diamond. Clarity:.
It cannot be considered as worthless.
Bits of carbon black spots are inclusions in the diamond.
It will not fetch a good price.
Some people consider it as a blemish
nevertheless it is not value less
2007-12-18 22:18:37 · answer #4 · answered by tmuthiah 5 · 0⤊ 1⤋
Those black spots are carbon and other impurities that were there when the diamond was formed. All diamond have them if they are natural "real" diamonds. It doesn't make the value of the diamond low. There are other things involved that have more of an effect on the value like the color, the cut, and the clarity.
2007-12-18 22:04:15 · answer #5 · answered by Az Outlaw Babe 2 · 1⤊ 0⤋
more than likely the black spots are caused by human oil.I.E. when you touch a piece of metal with out gloves on, you leave your own oil on the blade, causing it to react. Have you ever sen the antiques road show at all, when the experts handle blades and such, they always wear golves. You have to weigh two things, if you remove all of the black spots and petina, you may bring down the price(value) of the sword. Leaving all of the petins intact is arguably more better in the long run. Stugotz
2016-03-28 00:45:48 · answer #6 · answered by Anonymous · 0⤊ 0⤋
in my eye, a diamond with a 'flaw' like an inclusion or 'feather' is actually better than a FLAWLESS diamond... why?.. well, because you can IDENTIFY a flawed stone a lot easier than you can ID one that has no characteristics that are obvious....in an antique, the position of the flaws means a lot... like if they're UNDER the mounting bits or centered in the stone itself.... if the color is good and the overall clarity is nice and the cut is fine, who shives a git whether there's a little flaw?.... you've got something precious there....
2007-12-18 23:42:21 · answer #7 · answered by meanolmaw 7 · 0⤊ 1⤋
It is called flaws, the more flaws the least value. It is a poor quality stone. But don't despair, just being an antique ring gives it value as well.
2007-12-18 21:56:22 · answer #8 · answered by Anonymous · 0⤊ 1⤋
Those are flaws Im not positive of why I think something with carbon but I do think that it diminishes the value. The value goes on clarity and what grade like A, B, C, and so on
2007-12-18 21:53:23 · answer #9 · answered by Kj 4 · 0⤊ 1⤋