Black in diamond - why is it so?

[mrssparkles]

OK - I am sorry if this has been asked before (which I pretty much believe it has). I was shy and sent a pm to a fellow Pricescoper here, only to be encouraged to post my question here.

I would like to understand why is it that when I see some diamond photos on this site, the top view (table) shows some black? What does this mean? Are they bad diamonds?
I don''t even know what it is termed, so I cannot possibly search past threads or FAQ for information, although I believed it had been asked before.

Thanks in advance.

 

[Garry H (Cut Nut)]

There is an article in the journal on inclusion color. http://journal.pricescope.com/Articles/34/1/Black-Inclusions-in-Diamonds.aspx
But sometimes the shade of inclusion depends on where the light comes from.

 

[Scintillating]

You don't mean inclusions right?

You must mean the facets.
Simple answer - Some facets are windows which allow light through, which can appear dark at certain angles at certain times, and some are mirror which reflect light back at you.

Does some one know which tutorial includes this info?
Is it in GOG's tutorial?
If you know where it is please post a link.

Scintillating...

 

[Dancing Fire]

Date: 12/15/2005 9:52:18 PM
Author:mrssparkles

OK - I am sorry if this has been asked before (which I pretty much believe it has). I was shy and sent a pm to a fellow Pricescoper here, only to be encouraged to post my question here.

I would like to understand why is it that when I see some diamond photos on this site, the top view (table) shows some black? What does this mean? Are they bad diamonds?

I don''t even know what it is termed, so I cannot possibly search past threads or FAQ for information, although I believed it had been asked before.

Thanks in advance.

do you mean 8 black arrows?

 

[researcher]

My guess is it''s the reflection of the camera they''re using to take the photo of the stone, or the phenomenon of head obstruction (check out the video gallery for details).

 

[strmrdr]

Date: 12/15/2005 10:34:11 PM
Author: researcher
My guess is it''s the reflection of the camera they''re using to take the photo of the stone, or the phenomenon of head obstruction (check out the video gallery for details).

bingo :}
they are actualy one in the same the camera is causing head obstruction or head shadow if you will.


http://diamondscope.pricescope.com/?src=Head_Obstruction_1.wmv

 

[angel_nieves]

Now what is fish eye in a diamond and can you described what it looks like. Thank you

 

[strmrdr]

Date: 12/15/2005 11:01:11 PM
Author: angel_nieves
Now what is fish eye in a diamond and can you described what it looks like. Thank you

http://diamonds.pricescope.com/fisheye.asp

You wont see many pictures of em posted on the board.

 

[angel_nieves]

eeeeeeeekkkkkkkkkkkk Thank god for good cuts

 

[skphotoimages]

Sometime in this past week Rhino pointed out that some ideal cut diamonds go dark in bright sunlight. What is that all about? Mine does it in the sun, but if I shade it with my hand it is amazing once again. Can anyone elaborate on this phenominon (can''t spell)?

 

[strmrdr]

Date: 12/15/2005 11:30:28 PM
Author: skphotoimages
Sometime in this past week Rhino pointed out that some ideal cut diamonds go dark in bright sunlight. What is that all about? Mine does it in the sun, but if I shade it with my hand it is amazing once again. Can anyone elaborate on this phenominon (can''t spell)?

http://diamondscope.pricescope.com/?src=GarryhPro.wmv

I think it was that one that Garry showed it in.