Question about Indented Natural

[pyramid]

I have a diamond I had appraised (not a certificated diamond but nice for the price and it looks okay on the right hand).

There is somethiing puzzling me, which I should have asked at the time but has only popped into my mind now.

There is a v-shaped bit out of the girdle which is tiny. The diamond came back appraised higher than I thought it should. When I called the jeweller they wrote back saying they had contact their appraiser and he was aware of this but because it is external it does not affect the clarity grade.

When looking at the diamond top down with loupe I can see this v part take out but there is no inclusion to be seen, it is in a way like a cleft in a heart shape (but much smaller) and only affects the outline shape of the diamond.

I always thought this was an indented natural but I read they can affect clarity grade. I know this v shape would affect cut grade but it is not certified or being certified so I am not worried about that as it would not receive a top cut grade from proportions anyway.

My question is:

I know you cannot see it, but could this be an indented natural then? I know it could be a nick or chip also. It does not look like a chip because it is so much in a v shape though. Basically it is if you imagine a pie chart with a v taken out, although it is only at the edge of the diamond and not noticeable to the naked eye.

 

[pyramid]

Thinking about this (for mysef) I expect it depends on the surface under a microscope as to whether it is identified as an indented natural or a nick. That is if an indented natural can be just external to the body of the diamond and only affect cut - can it?

 

[Garry H (Cut Nut)]

If it has crystal features at high magnification then it will be a natural part of the skin of the rough diamond.
Otherwise it is probably a nick Pyramid - that fell out while bruting

 

[pyramid]

Thank you Garry.

 

[RockDoc]

Pyramid

This sounds like you MAY be seeing what we call a TRIGON. In an octhedron crystal you have triangular faces. Sometimes these are external, but it some cases they can be in the stone as well.

They are proof of natual origin.

But what your seeing MAY be what garry described, which is where there was one face of a crystal on the edge of the stone which fell out ( cause it is a separate crystal ) and you''re seeing the negative of where it had been and formed in the host crystal.

Rockdoc

 

[pyramid]

Thank you Rockdoc. Is it trigons which always have inclusions behind them? I think I remember reading something like that.

 

[diamondgirlNY]

Hi..
Trigons are actually a surface characteristic that is inherent to Natural Diamonds, they litterally look like equilateral triangles, and they are often seen under high power magnification....this will not effect the clarity of the diamond...it is actually one of the ways gemologists determine whether or not the stone is of natural origin or lab grown....
As for Indented Naturals, because they extend into the stone, YES, it does effect the clarity grade....as well as cut....One of the ways we differentiate between an indented natural and a "nick" "chip" or "cavity" is under high power magnification....an indented natural is what is left of the original rough...an "indentation" that is naturally inherent to the diamond...the other three are occurances that happen after the stone is "discovered"....one of the ways to tell is by looking at the surface of the triangular shaped indenture.....if the surface is smooth and shinny and (maybe trigons present) no signs of "grainy frostiness" then you know that it is an indented natural, but if you have step like fracturing and there is that "grainy frostiness" then you know that it is "damage" rather than natural.....

I hope this helped.

 

[pyramid]

Thank you diamondgirlNY

I think that the stone has a nick as Garry said where a crystal has fallen out. There is no frostyness or white area and there is nothing affecting the clarity (the appraiser said it did not affect clarity). The diamond is just clear with a v taken out of it.

I do not think it is a trigon from the pictures I have seen because it is only a v shape when looking at the diamond from the top from the side it is just a missing bit.

 

[RockDoc]

Date: 9/9/2006 12:14:34 PM
Author: Pyramid
Thank you Rockdoc. Is it trigons which always have inclusions behind them? I think I remember reading something like that.

Not always.

Usually they are on the edge ( girdle surface ) but I''ve seen some that are interna, but only rarelyl.

Rockdoc

 

[pyramid]

Thank you Rockdoc.