Trying to figure out if 14.0% crown height is appropriate.

[sarahjuliana]

Hi everyone,

In search for an all around acceptable diamond..I have been doing reseach and reading forums for the past month. I am learning a lot. I didn''t know how challenging it could be to find the right diamond. This is the first time I''ve joined a diamond forum site so please bare with me! I''m really hoping someone could help me..


I am currently puzzled on the Crown Height and Crown Angle of a round brilliant .60 diamond.GIA certified, Canadian Diamond.

Table: 56%
Total depth: 59.0%
Pavilion depth: 42.5%
Pavilion angle: 40.6
Culet: none
Crown Height: 14.0%
Crown Angle: 32.5
Girdle thickness: Thin to Slightly Thick. Faceted

Is the Crown Height and Crown Angle to low/shallow?

Thanks in advance for your opinions anyone!

 

[yssie]

The combination of 40.6/32.5 is definitely shallow - I'd want a 35.5-36 crown with that pavilion. I would shy from a sub-33 crown regardless of pavilion, though.

 

[stone-cold11]

Crown height is ok, just that the crown angle is quite small with a small pavilion angle. Might have obstruction issue.

 

[Lorelei]

Hi SarahJuliana

The angle combination in this case is what we call shallow/ shallow and obstruction can indeed be an issue in some cases. Obstruction is where the stone visibly darkens when it is inspected closely due to the viewer's head blocking the light to the stone. Here is a video titled Head Obstruction lower right by Garry Holloway.

http://diamondscope.pricescope.com/

 

[Rockdiamond]

HI sarahjuliana
Is this a diamond you are viewing in person?
If not, are there photos?

I see you''re going for a Canadian Diamond- is that a specific requirement?

I ask because if you''re viewing in person, it''s quite different than trying to buy online with no photos.

If it must be Canadian, that will limit your choices of available stones. Not that I''m questioning the choice, just pointing out the supply is less..

 

[sarahjuliana]

Date: 12/12/2009 10:20:56 PM
Author: yssie
The combination of 40.6/32.5 is definitely shallow - I''d want a 35.5-36 crown with that pavilion. I would shy from a sub-33 crown regardless of pavilion, though.

Thank you for your advice!!

 

[sarahjuliana]

Date: 12/13/2009 5:12:44 AM
Author: Stone-cold11
Crown height is ok, just that the crown angle is quite small with a small pavilion angle. Might have obstruction issue.

Thank you for your advice!!

 

[sarahjuliana]

Date: 12/13/2009 5:17:05 AM
Author: Lorelei
Hi SarahJuliana


The angle combination in this case is what we call shallow/ shallow and obstruction can indeed be an issue in some cases. Obstruction is where the stone visibly darkens when it is inspected closely due to the viewer''s head blocking the light to the stone. Here is a video titled Head Obstruction lower right by Garry Holloway.


http://diamondscope.pricescope.com/

Hi there,

I appreciate your input. I unfortunately could not get the video to play for me..is there a way you could forward it to me through email or is it on youtube?

Thanks again so much.

 

[sarahjuliana]

Date: 12/13/2009 6:18:58 PM
Author: Rockdiamond
HI sarahjuliana

Is this a diamond you are viewing in person?

If not, are there photos?


I see you''re going for a Canadian Diamond- is that a specific requirement?


I ask because if you''re viewing in person, it''s quite different than trying to buy online with no photos.


If it must be Canadian, that will limit your choices of available stones. Not that I''m questioning the choice, just pointing out the supply is less..

Hi there,

I am no longer following this particular diamond but yes i am trying to stick to following Canadian mined diamonds knowing that the supply is less. Unfortunatley I am noticing how expensive they can be therefore am looking at other options such as "Conflict Free" diamonds also.

I would not buy a diamond without seeing it in person first.

Thank you for your input, I appreciate all the knowledgable help I can get.

 

[Lorelei]

Date: 1/4/2010 5:42:06 PM
Author: sarahjuliana

Date: 12/13/2009 5:17:05 AM
Author: Lorelei
Hi SarahJuliana


The angle combination in this case is what we call shallow/ shallow and obstruction can indeed be an issue in some cases. Obstruction is where the stone visibly darkens when it is inspected closely due to the viewer''s head blocking the light to the stone. Here is a video titled Head Obstruction lower right by Garry Holloway.


http://diamondscope.pricescope.com/

Hi there,

I appreciate your input. I unfortunately could not get the video to play for me..is there a way you could forward it to me through email or is it on youtube?

Thanks again so much.

Hi Sarah

Email admin and they will be able to advise. Alternatively, what to look for is to see if the stone darkens when you look at it closely, often such diamonds look bright and sparkly when held away from the body but darken when viewed closely.

 

[Todd Gray]

Date: 1/4/2010 5:52:11 PM
Author: sarahjuliana
I am no longer following this particular diamond but yes i am trying to stick to following Canadian mined diamonds knowing that the supply is less. Unfortunately I am noticing how expensive they can be therefore am looking at other options such as ''Conflict Free'' diamonds also.

I''m confident that a little research will show that none of the diamond vendors here on PS deal in conflict diamonds and that we all source diamonds from legitimate sources with a clear supply chain. Several of us deal in diamonds of Canadian origin, there is a premium for diamonds manufactured from Canadian sourced rough as a result of government taxes imposed by Canada for their diamond production. Interestingly enough, most "Canadian diamonds" are not cut and polished in Canada and thus ultimately it still comes down to a matter of trusting your vendor in terms of whether the diamond is conflict free, since you generally have only the dealers word that the diamond was produced from diamond rough sourced from Canada... And before somebody steps up and challenges this statement by saying "what about the Certificate of Origin from Canada?" know that all that requires is that the cutter submit a form indicating what the final weight of the finished stone was and that is the only "verification" currently being required by the Canadian Government to "certify" a diamond as being Canadian - so there really isn''t a guarantee that a diamond being offered as Canadian is actually Canadian, beyond the word of the vendor, cutter, etc. so "conflict free" remains only as good as the morals and ethics of the dealers involved. Since the majority of the industry continues to make a conscious effort not to deal in conflict gems, the country of origin for the diamond rough seems of little consequence in my opinion.

 

[Paul-Antwerp]

Great point, Todd.

I will always remember the time a few years ago, when I drove from Vancouver into the US, in order to visit Todd in Roseburg, OR. When passing the border, I had to go through an immigrations-procedure, in which the officer tried to make me confess that I was hiding conflict-diamonds in my car. After a three-hour-interview, my car was searched, and I was finally allowed into the U.S.

Luckily, I could stop myself from answering jokingly ''Why, do you want some?'' to the question ''Do you deal in conflict diamonds?''

Live long,

 

[Todd Gray]

Date: 1/5/2010 4:09:52 PM
Author: Paul-Antwerp
Great point, Todd.

I will always remember the time a few years ago, when I drove from Vancouver into the US, in order to visit Todd in Roseburg, OR. When passing the border, I had to go through an immigrations-procedure, in which the officer tried to make me confess that I was hiding conflict-diamonds in my car. After a three-hour-interview, my car was searched, and I was finally allowed into the U.S.

Luckily, I could stop myself from answering jokingly ''Why, do you want some?'' to the question ''Do you deal in conflict diamonds?''

Live long,

Well you showed more restraint and intelligence than I did... A few years ago while crossing over the border into Canada, the Canadian customs official looked down at the Oregon plates on my car, looked up and asked "Do you have any firearms in the vehicle" to which I promptly responded "What would you like?" which resulted in four hours sitting idle while they tore apart my car looking for weapons of mass destruction or something

Hey wait a second! This was totally a case of ''profiling'' since the officer ''assumed'' that I might have weapons in the vehicle simple because I''m from Oregon!

(it''s a joke for anybody who doesn''t know me well)

 

[sarahjuliana]

Date: 1/5/2010 5:22:02 AM
Author: Lorelei

Date: 1/4/2010 5:42:06 PM

Author: sarahjuliana

Date: 12/13/2009 5:17:05 AM

Author: Lorelei

Hi SarahJuliana



The angle combination in this case is what we call shallow/ shallow and obstruction can indeed be an issue in some cases. Obstruction is where the stone visibly darkens when it is inspected closely due to the viewer''s head blocking the light to the stone. Here is a video titled Head Obstruction lower right by Garry Holloway.



http://diamondscope.pricescope.com/

Hi there,


I appreciate your input. I unfortunately could not get the video to play for me..is there a way you could forward it to me through email or is it on youtube?


Thanks again so much.

Hi Sarah


Email admin and they will be able to advise. Alternatively, what to look for is to see if the stone darkens when you look at it closely, often such diamonds look bright and sparkly when held away from the body but darken when viewed closely.

Hi Lorelei,

Thank you for your advice, it is much appreciated. So it is not good to purchase a stone that darkens as you look closer to it because this is part of an obstruction in the gem?

 

[sarahjuliana]

Date: 1/5/2010 2:36:44 PM
Author: Todd Gray

Date: 1/4/2010 5:52:11 PM

Author: sarahjuliana

I am no longer following this particular diamond but yes i am trying to stick to following Canadian mined diamonds knowing that the supply is less. Unfortunately I am noticing how expensive they can be therefore am looking at other options such as ''Conflict Free'' diamonds also.

I''m confident that a little research will show that none of the diamond vendors here on PS deal in conflict diamonds and that we all source diamonds from legitimate sources with a clear supply chain. Several of us deal in diamonds of Canadian origin, there is a premium for diamonds manufactured from Canadian sourced rough as a result of government taxes imposed by Canada for their diamond production. Interestingly enough, most ''Canadian diamonds'' are not cut and polished in Canada and thus ultimately it still comes down to a matter of trusting your vendor in terms of whether the diamond is conflict free, since you generally have only the dealers word that the diamond was produced from diamond rough sourced from Canada... And before somebody steps up and challenges this statement by saying ''what about the Certificate of Origin from Canada?'' know that all that requires is that the cutter submit a form indicating what the final weight of the finished stone was and that is the only ''verification'' currently being required by the Canadian Government to ''certify'' a diamond as being Canadian - so there really isn''t a guarantee that a diamond being offered as Canadian is actually Canadian, beyond the word of the vendor, cutter, etc. so ''conflict free'' remains only as good as the morals and ethics of the dealers involved. Since the majority of the industry continues to make a conscious effort not to deal in conflict gems, the country of origin for the diamond rough seems of little consequence in my opinion.

The Canadian diamond certificate of origin ensures an identifiable audit trail for each Canadian diamond from the mine to the retail jeweler. This is done through the maple leaf and Diamond Identification Number (DIN) laser inscribed on the girdle.

Conflict-free diamonds may also be mined in one country and cut in another. Almost all conflict-free diamonds today originate from Canada and are verifiable through either The Canadian Diamond Code of Conduct, Canadamark, or the Government of the Northwest Territories.

 

[Dreamer_D]

Date: 1/8/2010 11:40:42 PM
Author: sarahjuliana

Date: 1/5/2010 2:36:44 PM
Author: Todd Gray

Date: 1/4/2010 5:52:11 PM

Author: sarahjuliana

I am no longer following this particular diamond but yes i am trying to stick to following Canadian mined diamonds knowing that the supply is less. Unfortunately I am noticing how expensive they can be therefore am looking at other options such as ''Conflict Free'' diamonds also.

I''m confident that a little research will show that none of the diamond vendors here on PS deal in conflict diamonds and that we all source diamonds from legitimate sources with a clear supply chain. Several of us deal in diamonds of Canadian origin, there is a premium for diamonds manufactured from Canadian sourced rough as a result of government taxes imposed by Canada for their diamond production. Interestingly enough, most ''Canadian diamonds'' are not cut and polished in Canada and thus ultimately it still comes down to a matter of trusting your vendor in terms of whether the diamond is conflict free, since you generally have only the dealers word that the diamond was produced from diamond rough sourced from Canada... And before somebody steps up and challenges this statement by saying ''what about the Certificate of Origin from Canada?'' know that all that requires is that the cutter submit a form indicating what the final weight of the finished stone was and that is the only ''verification'' currently being required by the Canadian Government to ''certify'' a diamond as being Canadian - so there really isn''t a guarantee that a diamond being offered as Canadian is actually Canadian, beyond the word of the vendor, cutter, etc. so ''conflict free'' remains only as good as the morals and ethics of the dealers involved. Since the majority of the industry continues to make a conscious effort not to deal in conflict gems, the country of origin for the diamond rough seems of little consequence in my opinion.

The Canadian diamond certificate of origin ensures an identifiable audit trail for each Canadian diamond from the mine to the retail jeweler. This is done through the maple leaf and Diamond Identification Number (DIN) laser inscribed on the girdle.

Conflict-free diamonds may also be mined in one country and cut in another. Almost all conflict-free diamonds today originate from Canada and are verifiable through either The Canadian Diamond Code of Conduct, Canadamark, or the Government of the Northwest Territories.

I think you might have missed the point that Todd was making in the highlighted. The inscription is not made until the diamond is cut, leaving room for the problem that Todd speaks of. Trust is involved when you buy diamonds no matter where they come from, IMO. There was a thread recently about the Kimbery accord that you may find interesting, if these issues are very important to you. But buy what you like, I am just talking here

Have you seen the HCA tool (under tools at the top) ? It is a very good way to plug in the anges of a diamond you are considering and determine whether they are comlpimentary. You may also consider buying an idealscope, it only costs about $25. Info also on the tools bar.

 

[Lorelei]

Date: 1/8/2010 11:34:35 PM
Author: sarahjuliana




Hi Lorelei,

Thank you for your advice, it is much appreciated. So it is not good to purchase a stone that darkens as you look closer to it because this is part of an obstruction in the gem?

Hi Sarah

We can only guess without images concerning the potential for obstruction, the obstruction itself could be marginal to extensive....Now, I sometimes think obstruction can be a bit overblown here from my personal observations, it isn't a huge deal in some cases in my opinion but for advising someone who is purchasing it is very difficult, it is best to make them aware of this and if you can view the stone in person or get an image. If you can see the stone, look at it with the stone held close to your body with your head bent over it and see if it darkens. If it does and it bothers you then keep looking, if it doesn't bother you then fine, or it might not show much in the way of obstruction anyway.

 

[sarahjuliana]

Alright, thank you very much.

 

[sarahjuliana]

Then I should be looking for a diamond that was not only mined in Canada but cut and polished in Canada, as well? I think I understand where the switch or act of dishonesty could occur now. Thank you for the further explanation. I will look into the other tools you mentioned in your post also.

Thanks Again,