Inclusion in sapphire

[colormyworld]

Would it be safe to say this sapphire is unheated?

 

[colormyworld]

I guess I should post a bigger picture. oops wrong picture.

 

[colormyworld]

This is it.

 

[Michael_E]

Nope, that would not be a SAFE conclusion to make. Even though the magnification is high in this picture, the resolution doesn''t allow you to get a sharp enough look at the silk if that''s what it is. You need to look closer and with better resolution of those inclusions. A dark field lighting setup or fiber optic light would help.

 

[colormyworld]

Thanks for the reply. I am going to try and get a better picture. Doug

 

[Michael_E]

Doug,
The only type of picture that could give you any indication would be one through a microscope. Even then you would not get the depth of field that a microscope gives you. The slightly 3D effect of a good microscope allows you to see any effects that heating the stone would have produced. No picture posted on the web can give you enough information to be really sure of what has been done to the stone. Any comments would be more guess than anything. It is a very fine looking stone though. Great color !


Michael E.

 

[colormyworld]

Thanks Micheal. When I bought it the vendor said nothing about it being unheated. I took it to a gemologist and he thought it might be.I guess I thought that with the caliber of talent on P.S. and a close up picture I would get a better idea if it was or was not heated. One thing about it for sure is the cutting is terriable. Some time in the future I may call on you for your services if that is agreeable with you. Thanks Doug

 

[valeria101]

Well, there are those threads of silk there that look unharmed from this side of the screen ... so, well, 'guess there is a chance that this one did not go though some high temperature treatment. It's entertaining to guess-timate like this especially with a lovely blue picture infront, but this does not amount to a safe bet, as you say.

There's enough going on inside the sapphire to make for nice sightseeing under magnification!

Why to you call that cut terrible? Ovals are not my favorite shape, but this one does not seem particularly bad. Maybe a bit offcenter, but ... there's allot more worse than better. Of course, you can see this and I do not - just curious.

 

[colormyworld]

Thanks Micheal & Val I think the cutting is not so good because of the extinction. The stone is lively though. Also because of the " silk" the stone just glows blue.

 

[valeria101]

Date: 9/23/2005 4:35:09 PM
Author: colormyworld

Val I think the cutting is not so good because of the extinction.

I see.. before you pointing this out, I would have thought those darker facets are an effect of less than fortunate photography.

If I remember right, extinction comes from shallow angles and this stone does not appear deep cut at all. Is this why you have not tried some cut remedy this far?

Would you do this to a sapphire?

 

[Ymanda]

Well on the first post, the reflection of the lifgt on the crown shows that the light comes fro the top of the picture. So you will hardly get 100% brilliancy if the light doesn''t come 90° with the table.

Now, I would be VERY carefull with pictures found on websites because with more than one single light source it''s easy to show 100% brilliancy.

About the treatment, the silk doesn''t seem damaged but this is only for hight temperature treatment. What about low temperature, diffused stones, dyed stones... My point is that even with some nice microscope pictures, you need to use immersion, darkfield, diffuse light...
Well how can you expect a gemmologist to give a diagnostic through internet when it''s already hard sometimes in real life to take a decision ?
At least when a gemmologist takes the pictures himself, he would know that is important to be shown.

Thank you for the question, I think this stone as not been treated under with temperature. But that''s all I can say and I wouldn''t bet my watch on it.

 

[colormyworld]

You can not tell by the pic but the stone is as deep as it is wide. the photo is the lenth of the stone. I will take another pic .

 

[colormyworld]

Here is another pic to illustrate my point.

 

[colormyworld]

Yamanda thanks for your responce. All your points are well taken. Thanks Doug

 

[valeria101]

Date: 9/23/2005 5:53:33 PM
Author: colormyworld
Here is another pic to illustrate my point.

Wow! No.... I didn't see that comming. Depth shows in the other pictures but for some reason it didn't register with me. Oh well, I am not the one to chop stones lightly, but that sort of keel leaves you with more options that I would have thought when writing the previous post.

The color of that stone is so nice (trusting the pictures), even bottom up

 

[colormyworld]

The stone is about a 7.5mm by 5mm but weighs 1.80 cts I did not see your question about concave cutting until now. The answer is yes as I have a pink sapphire that Richard Homer has recut for me. It was another badly cut sapphire. This not a very good picture. Please excuse the dust .

 

[colormyworld]

I am happy with the cutting but it was kind of pricey. When I got it. It was 1.83cts. Mr. Homer took it down to about 1.5cts. I was going to weigh it just now but it is going into this ring.

 

[colormyworld]

I an putting a 25pt trillion shape diamonds on each side with other small diamonds. In white gold.

 

[Jelly]

Sorry for being off topic, but what is your avatar? It looks like worms, but I could be totally wrong.

 

[colormyworld]

I really should change it . It is a close up of a spiney lobster that I caught recently.