What is surface graining on a diamond?

What is Surface Graining? Is it a Deal Breaker? Technically speaking, surface graining refers to irregularities in the diamond’s structure that result in optical discontinuities. They typically show up as transparent lines which are only visible at certain lighting angles and high-powered magnification.

Is surface graining bad on a diamond?

A diamond with surface graining cannot be graded as having Flawless clarity, but an Internally Flawless grading can be given. If the surface graining is significant, a diamond can be given a VVS or below clarity grade even if there are no other clarity features.

What is graining in a diamond?

For the purposes of diamond grading, graining refers to optical discontinuities that are observable with a 10× loupe or a standard gemological micro- scope. The overall transparency of a diamond can be affected by these discontinuities to varying extent.

What are the worst inclusions in a diamond?


  • The 4 Worst Inclusions. …
  • 1) Black Carbon Spots. …
  • Not all Carbon is Bad… …
  • Point is, stay away from Black Spots! …
  • 2) Inclusions Top, Center of your Diamond. …
  • 3) Long Cracks or Fractures. …
  • 4) Chips on the Side of the Diamond. …
  • Girdle Chips.
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What does internal graining not shown mean?

Surface graining is not shown – This statement refers to the presence of irregularities in the diamond crystal during the growth process. … Internal graining is not shown – Like surface graining, the distortion of growth planes in the crystal lattice can result in faint lines within the diamond.

Is surface graining bad?

In reality, surface graining occurrences are so insignificant that even a trained gemologist will have difficulty in finding them with a 50X magnification. Bear in mind that this is well over the 10X magnification that is used in diamond grading and you won’t be able to see them with your naked eyes.

Do diamonds have a grain?

Diamonds can have graining as well. It is a result of discontinuities in the carbon lattice at the atomic level. Sometimes graining is of a nature that can be visible and impact the clarity grade. Or it can be transparent and have no impact on the clarity grade whatsoever.

What does indented natural mean on a diamond?

An area of the rough diamond’s surface which dips below the polished diamond’s surface. An indented natural is a part of the rough diamond that was left untouched during the polishing process and is usually found at the girdle.

Are diamond girdles important?

The girdle reduces the risk of damage on the diamond when jewelers work with it. A standard round diamond has 16 “valley” and 16 “hill” poistions, where the girdle rises and falls. Girdle thickness is reported as a range of thick to thin. Girdles can be rough (unpolished), polish (unfaceted) or polished and faceted.

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What does minor details of polish mean on a diamond?

But while the inside of these diamonds is pure, you might see comments about the diamond on the GIA grading certificate such as “minor details of polish,” or “manufacturing remnants,” or “surface graining.” These are extremely tiny details found on the surface or outside the diamond on the skin.

Are diamonds with inclusions worthless?

Most jewelers tell us not to worry about diamond inclusions if they do not affect the stone’s strength or severely impact its appearance. You can actually save a lot of money on a diamond if you opt to buy one with more inclusions.

Can you see flaws in a diamond?

Inclusions are small imperfections within a diamond that are created due to the extreme pressure and heat that diamond’s experience when they form. … Fortunately, most inclusions can only be seen under 10x magnification, so they are unnoticeable to the naked, untrained eye.

Are crystals bad in a diamond?

Needles, pinpoints, clouds, and crystals:

Diamond crystals, in whatever form, pose no durability issue whatsoever. They are simply diamond trapped within the diamond. As such, they can take many forms and shapes.

What is fluorescence diamond?

Fluorescence is the tendency of a diamond to emit a (soft) glow when exposed to ultraviolet light (UV light). The fluorescence effect is present in over 30% of diamonds and is an important consideration when buying a loose diamond. When UV light strikes a diamond with fluorescent properties, the stone emits a glow.

What are ideal diamond proportions?

Ideal Cut Diamond Proportions

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Best Diamond Proportions for Round Brilliant Diamonds<
Depth Percentage 59 to 62.6%
Table Percantage 54 to 57%
Girdle Thickness Thin to Slightly Thick
Culet None to Pointed

Can you see imperfections in SI1 diamonds?

SI1 clarity diamonds are Slightly Included to the 1st degree, meaning inclusions can be found with a standard jeweler’s loupe at 10x magnification. With most diamond shapes, SI1 clarity inclusions are almost always eye-clean, meaning you can’t see the imperfections with the naked eye.

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