Why is there a black line in my diamond?

Diamonds are entirely made up of carbon, and the black spots in them are just dots of carbon that hasn't crystallized. They are natural flaws that occurred during the formation of the diamond and are part of its structure. Black spots in diamonds are dots of carbon that hasn't crystallized.
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Why does my diamond have a line in it?

If you look at the side of your diamond and see a line across it, about ⅔ of the way down, don't panic. It's most likely a girdle reflection. Because of how light moves through a diamond, light that enters through the girdle will usually come out through the pavilion. This doesn't indicate poor cut quality.
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What are black inclusions in diamonds?

A common misconception is that an inclusion only refers to the black marks seen in diamonds. These black marks are crystals within the diamond comprised of the mineral carbon. In fact, there are many different types of inclusion that a diamond can have and not all are formed through natural processes.
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Can you see a line through a diamond?

If the diamond is real, its facets will refract the light in different directions, rather than in a straight line. Because of this refraction of light, you won't be able to see clearly through the diamond and make out the letters on the paper.
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How can you tell if a diamond is flawed?

Internal flaws
  1. Pinpoint inclusions. As the name implies, these inclusions are minute crystals usually white in color present inside the diamond. ...
  2. Needles. Diamond crystals in a diamond can also be present in the form of long and thin needles. ...
  3. Cloud. ...
  4. Knots. ...
  5. Graining. ...
  6. Feathers. ...
  7. Intergrowths. ...
  8. Cleavage.
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JANNPAUL Education: Why Does My Diamond Look so Dark?



What do poor quality diamonds look like?

Fair/Poor Grade Diamond Examples

Fair and Poor cut diamonds usually have steep crowns and steep pavilion angles which gives them a really dark looking appearance. This makes them look extremely small for their carat weight. Because of their abysmal proportions, their brilliance and sparkle are horribly affected.
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What are the worst inclusions in a diamond?

#1 – Chip (Worst Inclusion Type to Have)

A chip is defined as a shallow opening on the surface of the diamond and is often caused by an impact on a facet junction, girdle edge or culet. In my opinion, this is one of the worst inclusions to have in a diamond as a chip can weaken the stone's structural integrity.
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How do you check if a diamond is real?

This one's easy: Get a glass and fill it with water (it doesn't matter what type of water you use). Drop the diamond into the glass of water. Due to the high density of diamond, when dropped into water a real diamond will sink. If the diamond floats to the top or middle of the glass, it's fake.
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How do you tell if a diamond is real with a flashlight?

You can tell if a diamond is real with a flashlight when the diamond is observed to successfully separate light into spectral colors, where the fake comparison stone does not.
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How can you tell if a diamond is real by water?

Water testing your diamond

Get a glass full of water and simply drop your diamond into the glass. If the diamond is real, it will drop to the bottom of the glass due to the high density of the stone. If it's a fake, it will float on the surface of the water.
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Can you remove black spots from diamonds?

The most common way to remove a black carbon flaw is by laser drilling. A laser is used to drill a microscopic hole to the black spot. Heat or acid is then funneled through this channel and burns away the black spot. This leaves an empty space where the black spot used to be.
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Do most diamonds have black spots?

Inclusions in Diamonds

The most common are dark, black specks called carbon spots. Carbon spots come in all different shapes and sizes. Some diamonds have just a few; others have so many, they make the stone look almost black.
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Can you get rid of inclusions in diamonds?

Laser drilling is a technique used to remove inclusions such as black spots of non-crystallized carbon or foreign crystals embedded into the diamond. A very thin channel is drilled with laser from the surface of the diamond to the inclusion, which is then burned out.
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Can diamond inclusions get worse?

Once formed, inclusions don't grow or change; they can sometimes be removed through clarity enhancement techniques. The most commonly seen inclusions are in the form of black spots (carbon that hasn't crystallized), lines, small crystals (visible as pinpoints or clouds), and cracks.
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Can diamonds get damaged?

Diamonds are very stable and invulnerable to virtually all acids. They can also withstand higher temperatures than most gemstones. Sudden extreme temperature changes can cause damage, however. Diamonds can chip or fracture from hard impact, especially in areas where the carbon atoms are not tightly bonded.
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What does an inclusion in a diamond look like?

They are essentially tiny black spots, like blackheads on skin, which are noticeable on the table of a diamond. Feather inclusions are the second most common, and possibly one for concern. They are small internal cracks, and if they are present from top to bottom, the diamond's durability could be compromised.
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How should a real diamond sparkle?

The way that diamonds reflect light is unique: the inside of a real diamond should sparkle gray and white while the outside should reflect a rainbow of colors onto other surfaces. A fake diamond, on the other hand, will have rainbow colors that you can see inside the diamond as well.
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Will a real diamond fog up?

Does it Fog Up? The easiest at-home test is to breathe on your stone. If your stone fogs up quite a bit and takes time for the condensation to evaporate, then it is most likely fake. Real diamonds do fog up, but only a little and the condensation evaporates quickly.
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Do real diamonds glow under black light?

Natural diamonds have a property known as fluorescence. This phenomenon enables diamonds to produce glows of varied colors when exposed to black light (also known as ultraviolet light). A pure and natural diamond is known to produce a blue glow when exposed to black light.
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Will a real diamond scratch a mirror?

The Mohs scale is a scientific measurement of mineral hardness. Glass is rated a 5.5, and diamonds, the hardest mineral, are a 10. So, genuine diamonds will scratch a mirror. On the other hand, so will quartz (7), moissanite (9.25), and cubic zirconia (8).
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Can you scratch a real diamond?

Can You Scratch a Real Diamond? While incredibly tough, diamonds are still vulnerable to scratches just like other gemstones. The Mohs' scale (scale of mineral hardness) specifically defines hardness as the resistance to being scratched.
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Do diamond inclusions matter?

The less noticeable a diamond's inclusions are, the closer to flawless it will grade. The size of a diamond will affect its clarity grade. For example, a large diamond may have a small, but eye-visible, inclusion yet still receive a high clarity grade.
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Do inclusions affect a diamond's sparkle?

Clarity will affect how the diamond sparkles and looks under light — and fewer inclusions means the diamond will shine more brightly under the light.
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Do all diamonds have imperfections?

Almost every diamond has imperfections, but the clarity grading of a stone will reflect how visible these imperfections are. For example, VVS1-VVS2 diamonds (very, very slightly included)contain inclusions that are hard to see with a jeweler's loupe.
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