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Oh, and pendants should be quite a bit bigger than earrings.
1ct ER to 1.5ct pendant etc
So I would be looking for a 2.5ct pendant if I were you
My advice will seem strange.
1. look for a GIA Very Good shallow cut with HCA under 1.0. (some people in the trade reading this will remember the...
Hi Paul, a point, most of the very large diamonds are not cut into a single stone - e.g. some of the big rough Graff has bought recently was cut...
Direct sunlight should never be used for any test other than to see how a diamond looks in direct sunlight.
To do this test you could shade the...
Sorry, I misread your question. With UV off I expect no fluoro haziness.
As Dave says, a lot of naughty rough importers got caught in India round robining the same parcel to get bigger loan benefits etc and the banks...
It would be, but the point I wish to make is there are many environments where there is abundant UV and near visible violet light that cause a lot...
For the record, in general an inclusion under the table can be much smaller than an inclusion under a crown facet. Even as much as half the size /...
No idea - I took the photo about 5 years ago. Returned the sleepy stone to the supplier. They have never sent me another dud since - I...
Under Resources top tab there is a list of appraisers. Take the diamond and its report to one and save the sleepless nights!
Yes, BFF, some tubes emit more short wave length and UV than others. It was what started the whole shootin match.
GIA up till late 90's, or early...
I use a fluorescent lamp tube that emits quite strong UV and hold the diamond very close to the lamp, slightly behind and slightly infront. I see...
Melbourne. I think it is about the same as in USa except country towns can be tiny 1/4 to 1/2 ct etc.
Yes, it is for colorless. Sorry - if I put the entire chart up it is headed that way.
Yup, I will probably lose the bet, but it will be fun, and it probably means taking some nice people to dinner :bigsmile:
Here is part of a flow chart on using fluoro to answer your question Bryan.
I only used part because it is proprietary - Branko and John C's
D Flawless and Internally flawless 1.00ct non
faint is 3% cheaper
Medium is 15.5% cheaper
Strong is 31.5% cheaper.
There were no Very Strongs on...
Wow, I blink and you guys go and have loads of FUN!
1. Bryan did you say you are retiring?
2. the basis of my belief is there is new research and...
Vera and Resa
Sorry for musspullin
Please note this:
in the medium term there will be (more) research published that debunks the current perception and high color fluorexcent...
The GIA was over grading color of fluoro diamonds up till 20 years ago. Since then they changed their lights and distance to the lamp which...
I think all sides will produce rubbish info just like politicians.
When ever carbon credits are said to be used I am even more suspicious. I...
This applies to other labs too. I think it is unethical.
The HRD stone is dull. The clouds will reduce its brilliance. Compare it to other stones and you will see foryourself.
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You can do the HCA and LL DF
But how is this 65.1% - now that's what I call protecting your customers!
"GIA's mission is to...
Sorry for hijack, but how did your Mum know about magpie's? They are only here downunder!
In my personal experiance many HRD SI2's that I have seen would not get GIA SI2. So I suspect clouds.