Surface lines

[pyramid]

I remember someone saying on here that they had a ring which had some surface grain lines in the table and that after having the ring worked on by a jeweller there were some chips on the diamond and they happened to be where the lines were so she would stay away from lines in the future. Why would this happen do surface grain lines make a diamond more liable to chip by a jeweller?

 

[pyramid]

{bump}

 

[SummerGirl]

I would think if it breaks through to the top, it probably makes the stone weaker and more prone to chipping. However, I would say that the jeweler should be cautious when working on a stone with this type of flaw. (Although chips can happen on any clarity diamond.)

 

[pyramid]

But SummerGirl, I understand Surface Graining is external not an inclusion.

 

[SummerGirl]

Right, but I am saying it makes that area weaker, more prone to chipping because it is on the top.

But a chip can happen on any diamond. Even flawless.

 

[pyramid]

Yes I know any diamond can chip. However, I would not have thought though that surface graining would cause a chip to happen which is my question.
(It may have been described wrongly and perhaps the ring really had surface and internal graining in that area) Perhaps one of the experts here will know?

 

[SummerGirl]

Sorry I couldn't help pyramid.

Maybe it had something to do with the way the jeweler was working on the stone. (A little too rough with the diamond?)

I hope you find out the real answer!!

 

[pyramid]

It is not my ring. It was someone else on this board which wrote about it.

 

[mdx]

Hi Pyramid
It’s highly unlikely that the chips and surface graining are related. Although they are on the surface and look like lines they are caused by different crystallographic orientations and after polishing are not usually indented.

Johan

 

[pyramid]

Thank you mdx.

Surface Graining:
Surface indication of structural irregularity. May resemble faint facet junction lines, or cause a grooved or wavy surface, often cross facet junctions.


Does the above description of grooved mean something else then?