I recently ran into serious dilemma. According to AGTA identification lab they can determine in 100% of cases for all blue sapphires whether they were heat treated and/or diffused with beryllium or other elements. According to AGTA they would need only further testing for beryllium or other elements for other color stones (like, yellow, orange, pink, etc) and they are absolutely 100% positive to provide that determination for any blue sapphire.
Imagine my disbelief when I was stunned with GIA representative statement who said that they could not guarantee anything, even for the blue sapphires. I was under the impression that both labs are equally equipped and qualified for the task. Are my assumptions wrong? Can anybody enlighten me what is going on here? Does lattice diffusion or any other diffusion for that matter require high temperature heating? I was under the impression that it is a prerequisite. Also, how blue sapphire can be treated with other methods except high/low heat?? If it can be, what would be the element and color of original stone?? Somebody told me that they can take very dark blue stone and turn it into medium color blue. Is it true? BTW, for the sake of this discussion, let''s assume that stone is from Sri Lanka.
HELP!!!!
Imagine my disbelief when I was stunned with GIA representative statement who said that they could not guarantee anything, even for the blue sapphires. I was under the impression that both labs are equally equipped and qualified for the task. Are my assumptions wrong? Can anybody enlighten me what is going on here? Does lattice diffusion or any other diffusion for that matter require high temperature heating? I was under the impression that it is a prerequisite. Also, how blue sapphire can be treated with other methods except high/low heat?? If it can be, what would be the element and color of original stone?? Somebody told me that they can take very dark blue stone and turn it into medium color blue. Is it true? BTW, for the sake of this discussion, let''s assume that stone is from Sri Lanka.
HELP!!!!