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What are the chances this sapphire is natural?

fiona00004

Brilliant_Rock
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Joined
Oct 28, 2012
Messages
791
I found this 18k diamonds/sapphire ring, I have not purchased yet. Please tell me your opinion on this ring. I assume the sapphire is heated, but could it be treated with anything else? Says natural; is that lab reliable? It's listed for under $1200...is that good?

s-l400 (1).jpg s-l400.jpg
s-l400 (2).jpg
 

Bron357

Ideal_Rock
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Joined
Jan 22, 2014
Messages
4,324
The “lab report / appraisal” is rubbish.
Sapphires are not “type 2 gems” (Emeralds and Alexandrite are and it basically means that inclusions are to be expected due to how the crystals form) so I’d presume that means it’s got eye visible inclusions.
A blue sapphire colour is not graded as “fine”. It is graded accordingly to the colour tone and hue ie Cornflower, Royal, Velvet, Pastel etc.
What you want is a lab report that tells you what, if any, enhancements a gem has had. Their statement that gems are routinely enhanced is a BIG red flag in my book.
A natural sapphire can be heated, low heat. This is acceptable.
What is NOT acceptable in natural sapphires is them being treated with glass flux to fill up any cavities or cracks and/or being exposed to high heat and beryllium to improve the colour.
Identifying these treatments matters because highly treated gems are not stable and are basically valueless.
You would be better off buying an honest lab created sapphire than buying a “natural” sapphire that has been altered to look better.
AND I doubt believe the sapphire weighs 1.75 carats. They have just estimated in the setting.
If the sapphire is genuinely heat only, then $1,200 isn’t a bad price but if the sapphire is flux filled and/ or beryllium treated, it way too much.
 

fiona00004

Brilliant_Rock
Premium
Joined
Oct 28, 2012
Messages
791
The seller tells me it's only been heat treated and the sapphire is 7.75mm
 

MollyMalone

Ideal_Rock
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Jun 2, 2013
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3,128
* * * Sapphires are not “type 2 gems” (Emeralds and Alexandrite are and it basically means that inclusions are to be expected due to how the crystals form) so I’d presume that means it’s got eye visible inclusions.* * *
I agree that lab-appraisal report is not meaningful. But sapphires do indeed fall within GIA's colored gemstones Type II (sometimes denominated as Type 2) clarity category as per the table they established and publicized maybe more than 20 years ago, e.g.,
 
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